Datasets:

echodict
/

homotopyTypeTheory

% halpha: adds eprint field (www-admin@xxx.lanl.gov)
% an extension of:
% BibTeX standard bibliography style `alpha'
	% version 0.99a for BibTeX versions 0.99a or later, LaTeX version 2.09.
	% Copyright (C) 1985, all rights reserved.
	% Copying of this file is authorized only if either
	% (1) you make absolutely no changes to your copy, including name, or
	% (2) if you do make changes, you name it something other than
	% btxbst.doc, plain.bst, unsrt.bst, alpha.bst, and abbrv.bst.
	% This restriction helps ensure that all standard styles are identical.
	% The file btxbst.doc has the documentation for this style.

ENTRY
  { address
    author
    booktitle
    chapter
    edition
    editor
    eprint
    howpublished
    institution
    journal
    key
    month
    note
    number
    organization
    pages
    publisher
    school
    series
    title
    type
    volume
    year
  }
  {}
  { label extra.label sort.label }

INTEGERS { output.state before.all mid.sentence after.sentence after.block }

FUNCTION {init.state.consts}
{ #0 'before.all :=
  #1 'mid.sentence :=
  #2 'after.sentence :=
  #3 'after.block :=
}

STRINGS { s t }

FUNCTION {output.nonnull}
{ 's :=
  output.state mid.sentence =
    { ", " * write$ }
    { output.state after.block =
	{ add.period$ write$
	  newline$
	  "\newblock " write$
	}
	{ output.state before.all =
	    'write$
	    { add.period$ " " * write$ }
	  if$
	}
      if$
      mid.sentence 'output.state :=
    }
  if$
  s
}

FUNCTION {output}
{ duplicate$ empty$
    'pop$
    'output.nonnull
  if$
}

FUNCTION {output.check}
{ 't :=
  duplicate$ empty$
    { pop$ "empty " t * " in " * cite$ * warning$ }
    'output.nonnull
  if$
}

FUNCTION {output.bibitem}
{ newline$
  "\bibitem[" write$
  label write$
  "]{" write$
  cite$ write$
  "}" write$
  newline$
  ""
  before.all 'output.state :=
}

FUNCTION {fin.entry}
{ add.period$
  write$
  newline$
}

FUNCTION {new.block}
{ output.state before.all =
    'skip$
    { after.block 'output.state := }
  if$
}

FUNCTION {new.sentence}
{ output.state after.block =
    'skip$
    { output.state before.all =
	'skip$
	{ after.sentence 'output.state := }
      if$
    }
  if$
}

FUNCTION {not}
{   { #0 }
    { #1 }
  if$
}

FUNCTION {and}
{   'skip$
    { pop$ #0 }
  if$
}

FUNCTION {or}
{   { pop$ #1 }
    'skip$
  if$
}

FUNCTION {new.block.checka}
{ empty$
    'skip$
    'new.block
  if$
}

FUNCTION {new.block.checkb}
{ empty$
  swap$ empty$
  and
    'skip$
    'new.block
  if$
}

FUNCTION {new.sentence.checka}
{ empty$
    'skip$
    'new.sentence
  if$
}

FUNCTION {new.sentence.checkb}
{ empty$
  swap$ empty$
  and
    'skip$
    'new.sentence
  if$
}

FUNCTION {field.or.null}
{ duplicate$ empty$
    { pop$ "" }
    'skip$
  if$
}

FUNCTION {emphasize}
{ duplicate$ empty$
    { pop$ "" }
    { "{\em " swap$ * "}" * }
  if$
}

INTEGERS { nameptr namesleft numnames }

FUNCTION {format.names}
{ 's :=
  #1 'nameptr :=
  s num.names$ 'numnames :=
  numnames 'namesleft :=
    { namesleft #0 > }
    { s nameptr "{ff~}{vv~}{ll}{, jj}" format.name$ 't :=
      nameptr #1 >
	{ namesleft #1 >
	    { ", " * t * }
	    { numnames #2 >
		{ "," * }
		'skip$
	      if$
	      t "others" =
		{ " et~al." * }
		{ " and " * t * }
	      if$
	    }
	  if$
	}
	't
      if$
      nameptr #1 + 'nameptr :=
      namesleft #1 - 'namesleft :=
    }
  while$
}

FUNCTION {format.authors}
{ author empty$
    { "" }
    { author format.names }
  if$
}

FUNCTION {format.editors}
{ editor empty$
    { "" }
    { editor format.names
      editor num.names$ #1 >
	{ ", editors" * }
	{ ", editor" * }
      if$
    }
  if$
}

FUNCTION {format.title}
{ title empty$
    { "" }
    { title "t" change.case$ }
  if$
}

FUNCTION {format.eprint}
{ eprint empty$
    { "" }
    { eprint }
  if$
}


FUNCTION {n.dashify}
{ 't :=
  ""
    { t empty$ not }
    { t #1 #1 substring$ "-" =
	{ t #1 #2 substring$ "--" = not
	    { "--" *
	      t #2 global.max$ substring$ 't :=
	    }
	    {   { t #1 #1 substring$ "-" = }
		{ "-" *
		  t #2 global.max$ substring$ 't :=
		}
	      while$
	    }
	  if$
	}
	{ t #1 #1 substring$ *
	  t #2 global.max$ substring$ 't :=
	}
      if$
    }
  while$
}

FUNCTION {format.date}
{ year empty$
    { month empty$
	{ "" }
	{ "there's a month but no year in " cite$ * warning$
	  month
	}
      if$
    }
    { month empty$
	'year
	{ month " " * year * }
      if$
    }
  if$
}

FUNCTION {format.btitle}
{ title emphasize
}

FUNCTION {tie.or.space.connect}
{ duplicate$ text.length$ #3 <
    { "~" }
    { " " }
  if$
  swap$ * *
}

FUNCTION {either.or.check}
{ empty$
    'pop$
    { "can't use both " swap$ * " fields in " * cite$ * warning$ }
  if$
}

FUNCTION {format.bvolume}
{ volume empty$
    { "" }
    { "volume" volume tie.or.space.connect
      series empty$
	'skip$
	{ " of " * series emphasize * }
      if$
      "volume and number" number either.or.check
    }
  if$
}

FUNCTION {format.number.series}
{ volume empty$
    { number empty$
	{ series field.or.null }
	{ output.state mid.sentence =
	    { "number" }
	    { "Number" }
	  if$
	  number tie.or.space.connect
	  series empty$
	    { "there's a number but no series in " cite$ * warning$ }
	    { " in " * series * }
	  if$
	}
      if$
    }
    { "" }
  if$
}

FUNCTION {format.edition}
{ edition empty$
    { "" }
    { output.state mid.sentence =
	{ edition "l" change.case$ " edition" * }
	{ edition "t" change.case$ " edition" * }
      if$
    }
  if$
}

INTEGERS { multiresult }

FUNCTION {multi.page.check}
{ 't :=
  #0 'multiresult :=
    { multiresult not
      t empty$ not
      and
    }
    { t #1 #1 substring$
      duplicate$ "-" =
      swap$ duplicate$ "," =
      swap$ "+" =
      or or
	{ #1 'multiresult := }
	{ t #2 global.max$ substring$ 't := }
      if$
    }
  while$
  multiresult
}

FUNCTION {format.pages}
{ pages empty$
    { "" }
    { pages multi.page.check
	{ "pages" pages n.dashify tie.or.space.connect }
	{ "page" pages tie.or.space.connect }
      if$
    }
  if$
}

FUNCTION {format.vol.num.pages}
{ volume field.or.null
  number empty$
    'skip$
    { "(" number * ")" * *
      volume empty$
	{ "there's a number but no volume in " cite$ * warning$ }
	'skip$
      if$
    }
  if$
  pages empty$
    'skip$
    { duplicate$ empty$
	{ pop$ format.pages }
	{ ":" * pages n.dashify * }
      if$
    }
  if$
}

FUNCTION {format.chapter.pages}
{ chapter empty$
    'format.pages
    { type empty$
	{ "chapter" }
	{ type "l" change.case$ }
      if$
      chapter tie.or.space.connect
      pages empty$
	'skip$
	{ ", " * format.pages * }
      if$
    }
  if$
}

FUNCTION {format.in.ed.booktitle}
{ booktitle empty$
    { "" }
    { editor empty$
	{ "In " booktitle emphasize * }
	{ "In " format.editors * ", " * booktitle emphasize * }
      if$
    }
  if$
}

FUNCTION {empty.misc.check}
{ author empty$ title empty$ howpublished empty$
  month empty$ year empty$ note empty$
  and and and and and
  key empty$ not and
    { "all relevant fields are empty in " cite$ * warning$ }
    'skip$
  if$
}

FUNCTION {format.thesis.type}
{ type empty$
    'skip$
    { pop$
      type "t" change.case$
    }
  if$
}

FUNCTION {format.tr.number}
{ type empty$
    { "Technical Report" }
    'type
  if$
  number empty$
    { "t" change.case$ }
    { number tie.or.space.connect }
  if$
}

FUNCTION {format.article.crossref}
{ key empty$
    { journal empty$
	{ "need key or journal for " cite$ * " to crossref " * crossref *
	  warning$
	  ""
	}
	{ "In {\em " journal * "\/}" * }
      if$
    }
    { "In " key * }
  if$
  " \cite{" * crossref * "}" *
}

FUNCTION {format.crossref.editor}
{ editor #1 "{vv~}{ll}" format.name$
  editor num.names$ duplicate$
  #2 >
    { pop$ " et~al." * }
    { #2 <
	'skip$
	{ editor #2 "{ff }{vv }{ll}{ jj}" format.name$ "others" =
	    { " et~al." * }
	    { " and " * editor #2 "{vv~}{ll}" format.name$ * }
	  if$
	}
      if$
    }
  if$
}

FUNCTION {format.book.crossref}
{ volume empty$
    { "empty volume in " cite$ * "'s crossref of " * crossref * warning$
      "In "
    }
    { "Volume" volume tie.or.space.connect
      " of " *
    }
  if$
  editor empty$
  editor field.or.null author field.or.null =
  or
    { key empty$
	{ series empty$
	    { "need editor, key, or series for " cite$ * " to crossref " *
	      crossref * warning$
	      "" *
	    }
	    { "{\em " * series * "\/}" * }
	  if$
	}
	{ key * }
      if$
    }
    { format.crossref.editor * }
  if$
  " \cite{" * crossref * "}" *
}

FUNCTION {format.incoll.inproc.crossref}
{ editor empty$
  editor field.or.null author field.or.null =
  or
    { key empty$
	{ booktitle empty$
	    { "need editor, key, or booktitle for " cite$ * " to crossref " *
	      crossref * warning$
	      ""
	    }
	    { "In {\em " booktitle * "\/}" * }
	  if$
	}
	{ "In " key * }
      if$
    }
    { "In " format.crossref.editor * }
  if$
  " \cite{" * crossref * "}" *
}

FUNCTION {article}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  crossref missing$
    { journal emphasize "journal" output.check
      format.vol.num.pages output
      format.date "year" output.check
    }
    { format.article.crossref output.nonnull
      format.pages output
    }
  if$
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {book}
{ output.bibitem
  author empty$
    { format.editors "author and editor" output.check }
    { format.authors output.nonnull
      crossref missing$
	{ "author and editor" editor either.or.check }
	'skip$
      if$
    }
  if$
  new.block
  format.btitle "title" output.check
  crossref missing$
    { format.bvolume output
      new.block
      format.number.series output
      new.sentence
      publisher "publisher" output.check
      address output
    }
    { new.block
      format.book.crossref output.nonnull
    }
  if$
  format.edition output
  format.date "year" output.check
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {booklet}
{ output.bibitem
  format.authors output
  new.block
  format.title "title" output.check
  howpublished address new.block.checkb
  howpublished output
  address output
  format.date output
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {inbook}
{ output.bibitem
  author empty$
    { format.editors "author and editor" output.check }
    { format.authors output.nonnull
      crossref missing$
	{ "author and editor" editor either.or.check }
	'skip$
      if$
    }
  if$
  new.block
  format.btitle "title" output.check
  crossref missing$
    { format.bvolume output
      format.chapter.pages "chapter and pages" output.check
      new.block
      format.number.series output
      new.sentence
      publisher "publisher" output.check
      address output
    }
    { format.chapter.pages "chapter and pages" output.check
      new.block
      format.book.crossref output.nonnull
    }
  if$
  format.edition output
  format.date "year" output.check
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {incollection}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  crossref missing$
    { format.in.ed.booktitle "booktitle" output.check
      format.bvolume output
      format.number.series output
      format.chapter.pages output
      new.sentence
      publisher "publisher" output.check
      address output
      format.edition output
      format.date "year" output.check
    }
    { format.incoll.inproc.crossref output.nonnull
      format.chapter.pages output
    }
  if$
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {inproceedings}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  crossref missing$
    { format.in.ed.booktitle "booktitle" output.check
      format.bvolume output
      format.number.series output
      format.pages output
      address empty$
	{ organization publisher new.sentence.checkb
	  organization output
	  publisher output
	  format.date "year" output.check
	}
	{ address output.nonnull
	  format.date "year" output.check
	  new.sentence
	  organization output
	  publisher output
	}
      if$
    }
    { format.incoll.inproc.crossref output.nonnull
      format.pages output
    }
  if$
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {conference} { inproceedings }

FUNCTION {manual}
{ output.bibitem
  author empty$
    { organization empty$
	'skip$
	{ organization output.nonnull
	  address output
	}
      if$
    }
    { format.authors output.nonnull }
  if$
  new.block
  format.btitle "title" output.check
  author empty$
    { organization empty$
	{ address new.block.checka
	  address output
	}
	'skip$
      if$
    }
    { organization address new.block.checkb
      organization output
      address output
    }
  if$
  format.edition output
  format.date output
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {mastersthesis}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  "Master's thesis" format.thesis.type output.nonnull
  school "school" output.check
  address output
  format.date "year" output.check
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {misc}
{ output.bibitem
  format.authors output
  title howpublished new.block.checkb
  format.title output
  howpublished new.block.checka
  howpublished output
  format.date output
  format.eprint output
  new.block
  note output
  fin.entry
  empty.misc.check
}

FUNCTION {phdthesis}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.btitle "title" output.check
  new.block
  "PhD thesis" format.thesis.type output.nonnull
  school "school" output.check
  address output
  format.date "year" output.check
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {proceedings}
{ output.bibitem
  editor empty$
    { organization output }
    { format.editors output.nonnull }
  if$
  new.block
  format.btitle "title" output.check
  format.bvolume output
  format.number.series output
  address empty$
    { editor empty$
	{ publisher new.sentence.checka }
	{ organization publisher new.sentence.checkb
	  organization output
	}
      if$
      publisher output
      format.date "year" output.check
    }
    { address output.nonnull
      format.date "year" output.check
      new.sentence
      editor empty$
	'skip$
	{ organization output }
      if$
      publisher output
    }
  if$
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {techreport}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  format.tr.number output.nonnull
  institution "institution" output.check
  address output
  format.date "year" output.check
  format.eprint output
  new.block
  note output
  fin.entry
}

FUNCTION {unpublished}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  note "note" output.check
  format.date output
  format.eprint output
  fin.entry
}

FUNCTION {default.type} { misc }

MACRO {jan} {"January"}

MACRO {feb} {"February"}

MACRO {mar} {"March"}

MACRO {apr} {"April"}

MACRO {may} {"May"}

MACRO {jun} {"June"}

MACRO {jul} {"July"}

MACRO {aug} {"August"}

MACRO {sep} {"September"}

MACRO {oct} {"October"}

MACRO {nov} {"November"}

MACRO {dec} {"December"}

MACRO {acmcs} {"ACM Computing Surveys"}

MACRO {acta} {"Acta Informatica"}

MACRO {cacm} {"Communications of the ACM"}

MACRO {ibmjrd} {"IBM Journal of Research and Development"}

MACRO {ibmsj} {"IBM Systems Journal"}

MACRO {ieeese} {"IEEE Transactions on Software Engineering"}

MACRO {ieeetc} {"IEEE Transactions on Computers"}

MACRO {ieeetcad}
 {"IEEE Transactions on Computer-Aided Design of Integrated Circuits"}

MACRO {ipl} {"Information Processing Letters"}

MACRO {jacm} {"Journal of the ACM"}

MACRO {jcss} {"Journal of Computer and System Sciences"}

MACRO {scp} {"Science of Computer Programming"}

MACRO {sicomp} {"SIAM Journal on Computing"}

MACRO {tocs} {"ACM Transactions on Computer Systems"}

MACRO {tods} {"ACM Transactions on Database Systems"}

MACRO {tog} {"ACM Transactions on Graphics"}

MACRO {toms} {"ACM Transactions on Mathematical Software"}

MACRO {toois} {"ACM Transactions on Office Information Systems"}

MACRO {toplas} {"ACM Transactions on Programming Languages and Systems"}

MACRO {tcs} {"Theoretical Computer Science"}

READ

FUNCTION {sortify}
{ purify$
  "l" change.case$
}

INTEGERS { len }

FUNCTION {chop.word}
{ 's :=
  'len :=
  s #1 len substring$ =
    { s len #1 + global.max$ substring$ }
    's
  if$
}

INTEGERS { et.al.char.used }

FUNCTION {initialize.et.al.char.used}
{ #0 'et.al.char.used :=
}

EXECUTE {initialize.et.al.char.used}

FUNCTION {format.lab.names}
{ 's :=
  s num.names$ 'numnames :=
  numnames #1 >
    { numnames #4 >
	{ #3 'namesleft := }
	{ numnames 'namesleft := }
      if$
      #1 'nameptr :=
      ""
	{ namesleft #0 > }
	{ nameptr numnames =
	    { s nameptr "{ff }{vv }{ll}{ jj}" format.name$ "others" =
		{ "{\etalchar{+}}" *
		  #1 'et.al.char.used :=
		}
		{ s nameptr "{v{}}{l{}}" format.name$ * }
	      if$
	    }
	    { s nameptr "{v{}}{l{}}" format.name$ * }
	  if$
	  nameptr #1 + 'nameptr :=
	  namesleft #1 - 'namesleft :=
	}
      while$
      numnames #4 >
	{ "{\etalchar{+}}" *
	  #1 'et.al.char.used :=
	}
	'skip$
      if$
    }
    { s #1 "{v{}}{l{}}" format.name$
      duplicate$ text.length$ #2 <
	{ pop$ s #1 "{ll}" format.name$ #3 text.prefix$ }
	'skip$
      if$
    }
  if$
}

FUNCTION {author.key.label}
{ author empty$
    { key empty$
	{ cite$ #1 #3 substring$ }
	{ key #3 text.prefix$ }
      if$
    }
    { author format.lab.names }
  if$
}

FUNCTION {author.editor.key.label}
{ author empty$
    { editor empty$
	{ key empty$
	    { cite$ #1 #3 substring$ }
	    { key #3 text.prefix$ }
	  if$
	}
	{ editor format.lab.names }
      if$
    }
    { author format.lab.names }
  if$
}

FUNCTION {author.key.organization.label}
{ author empty$
    { key empty$
	{ organization empty$
	    { cite$ #1 #3 substring$ }
	    { "The " #4 organization chop.word #3 text.prefix$ }
	  if$
	}
	{ key #3 text.prefix$ }
      if$
    }
    { author format.lab.names }
  if$
}

FUNCTION {editor.key.organization.label}
{ editor empty$
    { key empty$
	{ organization empty$
	    { cite$ #1 #3 substring$ }
	    { "The " #4 organization chop.word #3 text.prefix$ }
	  if$
	}
	{ key #3 text.prefix$ }
      if$
    }
    { editor format.lab.names }
  if$
}

FUNCTION {calc.label}
{ type$ "book" =
  type$ "inbook" =
  or
    'author.editor.key.label
    { type$ "proceedings" =
	'editor.key.organization.label
	{ type$ "manual" =
	    'author.key.organization.label
	    'author.key.label
	  if$
	}
      if$
    }
  if$
  duplicate$
  year field.or.null purify$ #-1 #2 substring$
  *
  'label :=
  year field.or.null purify$ #-1 #4 substring$
  *
  sortify 'sort.label :=
}

FUNCTION {sort.format.names}
{ 's :=
  #1 'nameptr :=
  ""
  s num.names$ 'numnames :=
  numnames 'namesleft :=
    { namesleft #0 > }
    { nameptr #1 >
	{ "   " * }
	'skip$
      if$
      s nameptr "{vv{ } }{ll{ }}{  ff{ }}{  jj{ }}" format.name$ 't :=
      nameptr numnames = t "others" = and
	{ "et al" * }
	{ t sortify * }
      if$
      nameptr #1 + 'nameptr :=
      namesleft #1 - 'namesleft :=
    }
  while$
}

FUNCTION {sort.format.title}
{ 't :=
  "A " #2
    "An " #3
      "The " #4 t chop.word
    chop.word
  chop.word
  sortify
  #1 global.max$ substring$
}

FUNCTION {author.sort}
{ author empty$
    { key empty$
	{ "to sort, need author or key in " cite$ * warning$
	  ""
	}
	{ key sortify }
      if$
    }
    { author sort.format.names }
  if$
}

FUNCTION {author.editor.sort}
{ author empty$
    { editor empty$
	{ key empty$
	    { "to sort, need author, editor, or key in " cite$ * warning$
	      ""
	    }
	    { key sortify }
	  if$
	}
	{ editor sort.format.names }
      if$
    }
    { author sort.format.names }
  if$
}

FUNCTION {author.organization.sort}
{ author empty$
    { organization empty$
	{ key empty$
	    { "to sort, need author, organization, or key in " cite$ * warning$
	      ""
	    }
	    { key sortify }
	  if$
	}
	{ "The " #4 organization chop.word sortify }
      if$
    }
    { author sort.format.names }
  if$
}

FUNCTION {editor.organization.sort}
{ editor empty$
    { organization empty$
	{ key empty$
	    { "to sort, need editor, organization, or key in " cite$ * warning$
	      ""
	    }
	    { key sortify }
	  if$
	}
	{ "The " #4 organization chop.word sortify }
      if$
    }
    { editor sort.format.names }
  if$
}

FUNCTION {presort}
{ calc.label
  sort.label
  "    "
  *
  type$ "book" =
  type$ "inbook" =
  or
    'author.editor.sort
    { type$ "proceedings" =
	'editor.organization.sort
	{ type$ "manual" =
	    'author.organization.sort
	    'author.sort
	  if$
	}
      if$
    }
  if$
  *
  "    "
  *
  year field.or.null sortify
  *
  "    "
  *
  title field.or.null
  sort.format.title
  *
  #1 entry.max$ substring$
  'sort.key$ :=
}

ITERATE {presort}

SORT

STRINGS { longest.label last.sort.label next.extra }

INTEGERS { longest.label.width last.extra.num }

FUNCTION {initialize.longest.label}
{ "" 'longest.label :=
  #0 int.to.chr$ 'last.sort.label :=
  "" 'next.extra :=
  #0 'longest.label.width :=
  #0 'last.extra.num :=
}

FUNCTION {forward.pass}
{ last.sort.label sort.label =
    { last.extra.num #1 + 'last.extra.num :=
      last.extra.num int.to.chr$ 'extra.label :=
    }
    { "a" chr.to.int$ 'last.extra.num :=
      "" 'extra.label :=
      sort.label 'last.sort.label :=
    }
  if$
}

FUNCTION {reverse.pass}
{ next.extra "b" =
    { "a" 'extra.label := }
    'skip$
  if$
  label extra.label * 'label :=
  label width$ longest.label.width >
    { label 'longest.label :=
      label width$ 'longest.label.width :=
    }
    'skip$
  if$
  extra.label 'next.extra :=
}

EXECUTE {initialize.longest.label}

ITERATE {forward.pass}

REVERSE {reverse.pass}

FUNCTION {begin.bib}
{ et.al.char.used
    { "\newcommand{\etalchar}[1]{$^{#1}$}" write$ newline$ }
    'skip$
  if$
  preamble$ empty$
    'skip$
    { preamble$ write$ newline$ }
  if$
  "\begin{thebibliography}{"  longest.label  * "}" * write$ newline$
}

EXECUTE {begin.bib}

EXECUTE {init.state.consts}

ITERATE {call.type$}

FUNCTION {end.bib}
{ newline$
  "\end{thebibliography}" write$ newline$
}

EXECUTE {end.bib}

	% halpha: adds eprint field (www-admin@xxx.lanl.gov)
	% an extension of:
	% BibTeX standard bibliography style `alpha'
	% version 0.99a for BibTeX versions 0.99a or later, LaTeX version 2.09.
	% Copyright (C) 1985, all rights reserved.
	% Copying of this file is authorized only if either
	% (1) you make absolutely no changes to your copy, including name, or
	% (2) if you do make changes, you name it something other than
	% btxbst.doc, plain.bst, unsrt.bst, alpha.bst, and abbrv.bst.
	% This restriction helps ensure that all standard styles are identical.
	% The file btxbst.doc has the documentation for this style.

	ENTRY
	{ address
	author
	booktitle
	chapter
	edition
	editor
	eprint
	howpublished
	institution
	journal
	key
	month
	note
	number
	organization
	pages
	publisher
	school
	series
	title
	type
	volume
	year
	}
	{}
	{ label extra.label sort.label }

	INTEGERS { output.state before.all mid.sentence after.sentence after.block }

	FUNCTION {init.state.consts}
	{ #0 'before.all :=
	#1 'mid.sentence :=
	#2 'after.sentence :=
	#3 'after.block :=
	}

	STRINGS { s t }

	FUNCTION {output.nonnull}
	{ 's :=
	output.state mid.sentence =
	{ ", " * write$ }
	{ output.state after.block =
	{ add.period$ write$
	newline$
	"\newblock " write$
	}
	{ output.state before.all =
	'write$
	{ add.period$ " " * write$ }
	if$
	}
	if$
	mid.sentence 'output.state :=
	}
	if$
	s
	}

	FUNCTION {output}
	{ duplicate$ empty$
	'pop$
	'output.nonnull
	if$
	}

	FUNCTION {output.check}
	{ 't :=
	duplicate$ empty$
	{ pop$ "empty " t * " in " * cite$ * warning$ }
	'output.nonnull
	if$
	}

	FUNCTION {output.bibitem}
	{ newline$
	"\bibitem[" write$
	label write$
	"]{" write$
	cite$ write$
	"}" write$
	newline$
	""
	before.all 'output.state :=
	}

	FUNCTION {fin.entry}
	{ add.period$
	write$
	newline$
	}

	FUNCTION {new.block}
	{ output.state before.all =
	'skip$
	{ after.block 'output.state := }
	if$
	}

	FUNCTION {new.sentence}
	{ output.state after.block =
	'skip$
	{ output.state before.all =
	'skip$
	{ after.sentence 'output.state := }
	if$
	}
	if$
	}

	FUNCTION {not}
	{ { #0 }
	{ #1 }
	if$
	}

	FUNCTION {and}
	{ 'skip$
	{ pop$ #0 }
	if$
	}

	FUNCTION {or}
	{ { pop$ #1 }
	'skip$
	if$
	}

	FUNCTION {new.block.checka}
	{ empty$
	'skip$
	'new.block
	if$
	}

	FUNCTION {new.block.checkb}
	{ empty$
	swap$ empty$
	and
	'skip$
	'new.block
	if$
	}

	FUNCTION {new.sentence.checka}
	{ empty$
	'skip$
	'new.sentence
	if$
	}

	FUNCTION {new.sentence.checkb}
	{ empty$
	swap$ empty$
	and
	'skip$
	'new.sentence
	if$
	}

	FUNCTION {field.or.null}
	{ duplicate$ empty$
	{ pop$ "" }
	'skip$
	if$
	}

	FUNCTION {emphasize}
	{ duplicate$ empty$
	{ pop$ "" }
	{ "{\em " swap$ * "}" * }
	if$
	}

	INTEGERS { nameptr namesleft numnames }

	FUNCTION {format.names}
	{ 's :=
	#1 'nameptr :=
	s num.names$ 'numnames :=
	numnames 'namesleft :=
	{ namesleft #0 > }
	{ s nameptr "{ff~}{vv~}{ll}{, jj}" format.name$ 't :=
	nameptr #1 >
	{ namesleft #1 >
	{ ", " * t * }
	{ numnames #2 >
	{ "," * }
	'skip$
	if$
	t "others" =
	{ " et~al." * }
	{ " and " * t * }
	if$
	}
	if$
	}
	't
	if$
	nameptr #1 + 'nameptr :=
	namesleft #1 - 'namesleft :=
	}
	while$
	}

	FUNCTION {format.authors}
	{ author empty$
	{ "" }
	{ author format.names }
	if$
	}

	FUNCTION {format.editors}
	{ editor empty$
	{ "" }
	{ editor format.names
	editor num.names$ #1 >
	{ ", editors" * }
	{ ", editor" * }
	if$
	}
	if$
	}

	FUNCTION {format.title}
	{ title empty$
	{ "" }
	{ title "t" change.case$ }
	if$
	}

	FUNCTION {format.eprint}
	{ eprint empty$
	{ "" }
	{ eprint }
	if$
	}


	FUNCTION {n.dashify}
	{ 't :=
	""
	{ t empty$ not }
	{ t #1 #1 substring$ "-" =
	{ t #1 #2 substring$ "--" = not
	{ "--" *
	t #2 global.max$ substring$ 't :=
	}
	{ { t #1 #1 substring$ "-" = }
	{ "-" *
	t #2 global.max$ substring$ 't :=
	}
	while$
	}
	if$
	}
	{ t #1 #1 substring$ *
	t #2 global.max$ substring$ 't :=
	}
	if$
	}
	while$
	}

	FUNCTION {format.date}
	{ year empty$
	{ month empty$
	{ "" }
	{ "there's a month but no year in " cite$ * warning$
	month
	}
	if$
	}
	{ month empty$
	'year
	{ month " " * year * }
	if$
	}
	if$
	}

	FUNCTION {format.btitle}
	{ title emphasize
	}

	FUNCTION {tie.or.space.connect}
	{ duplicate$ text.length$ #3 <
	{ "~" }
	{ " " }
	if$
	swap$ * *
	}

	FUNCTION {either.or.check}
	{ empty$
	'pop$
	{ "can't use both " swap$ * " fields in " * cite$ * warning$ }
	if$
	}

	FUNCTION {format.bvolume}
	{ volume empty$
	{ "" }
	{ "volume" volume tie.or.space.connect
	series empty$
	'skip$
	{ " of " * series emphasize * }
	if$
	"volume and number" number either.or.check
	}
	if$
	}

	FUNCTION {format.number.series}
	{ volume empty$
	{ number empty$
	{ series field.or.null }
	{ output.state mid.sentence =
	{ "number" }
	{ "Number" }
	if$
	number tie.or.space.connect
	series empty$
	{ "there's a number but no series in " cite$ * warning$ }
	{ " in " * series * }
	if$
	}
	if$
	}
	{ "" }
	if$
	}

	FUNCTION {format.edition}
	{ edition empty$
	{ "" }
	{ output.state mid.sentence =
	{ edition "l" change.case$ " edition" * }
	{ edition "t" change.case$ " edition" * }
	if$
	}
	if$
	}

	INTEGERS { multiresult }

	FUNCTION {multi.page.check}
	{ 't :=
	#0 'multiresult :=
	{ multiresult not
	t empty$ not
	and
	}
	{ t #1 #1 substring$
	duplicate$ "-" =
	swap$ duplicate$ "," =
	swap$ "+" =
	or or
	{ #1 'multiresult := }
	{ t #2 global.max$ substring$ 't := }
	if$
	}
	while$
	multiresult
	}

	FUNCTION {format.pages}
	{ pages empty$
	{ "" }
	{ pages multi.page.check
	{ "pages" pages n.dashify tie.or.space.connect }
	{ "page" pages tie.or.space.connect }
	if$
	}
	if$
	}

	FUNCTION {format.vol.num.pages}
	{ volume field.or.null
	number empty$
	'skip$
	{ "(" number * ")" * *
	volume empty$
	{ "there's a number but no volume in " cite$ * warning$ }
	'skip$
	if$
	}
	if$
	pages empty$
	'skip$
	{ duplicate$ empty$
	{ pop$ format.pages }
	{ ":" * pages n.dashify * }
	if$
	}
	if$
	}

	FUNCTION {format.chapter.pages}
	{ chapter empty$
	'format.pages
	{ type empty$
	{ "chapter" }
	{ type "l" change.case$ }
	if$
	chapter tie.or.space.connect
	pages empty$
	'skip$
	{ ", " * format.pages * }
	if$
	}
	if$
	}

	FUNCTION {format.in.ed.booktitle}
	{ booktitle empty$
	{ "" }
	{ editor empty$
	{ "In " booktitle emphasize * }
	{ "In " format.editors * ", " * booktitle emphasize * }
	if$
	}
	if$
	}

	FUNCTION {empty.misc.check}
	{ author empty$ title empty$ howpublished empty$
	month empty$ year empty$ note empty$
	and and and and and
	key empty$ not and
	{ "all relevant fields are empty in " cite$ * warning$ }
	'skip$
	if$
	}

	FUNCTION {format.thesis.type}
	{ type empty$
	'skip$
	{ pop$
	type "t" change.case$
	}
	if$
	}

	FUNCTION {format.tr.number}
	{ type empty$
	{ "Technical Report" }
	'type
	if$
	number empty$
	{ "t" change.case$ }
	{ number tie.or.space.connect }
	if$
	}

	FUNCTION {format.article.crossref}
	{ key empty$
	{ journal empty$
	{ "need key or journal for " cite$ * " to crossref " * crossref *
	warning$
	""
	}
	{ "In {\em " journal * "\/}" * }
	if$
	}
	{ "In " key * }
	if$
	" \cite{" * crossref * "}" *
	}

	FUNCTION {format.crossref.editor}
	{ editor #1 "{vv~}{ll}" format.name$
	editor num.names$ duplicate$
	#2 >
	{ pop$ " et~al." * }
	{ #2 <
	'skip$
	{ editor #2 "{ff }{vv }{ll}{ jj}" format.name$ "others" =
	{ " et~al." * }
	{ " and " * editor #2 "{vv~}{ll}" format.name$ * }
	if$
	}
	if$
	}
	if$
	}

	FUNCTION {format.book.crossref}
	{ volume empty$
	{ "empty volume in " cite$ * "'s crossref of " * crossref * warning$
	"In "
	}
	{ "Volume" volume tie.or.space.connect
	" of " *
	}
	if$
	editor empty$
	editor field.or.null author field.or.null =
	or
	{ key empty$
	{ series empty$
	{ "need editor, key, or series for " cite$ * " to crossref " *
	crossref * warning$
	"" *
	}
	{ "{\em " * series * "\/}" * }
	if$
	}
	{ key * }
	if$
	}
	{ format.crossref.editor * }
	if$
	" \cite{" * crossref * "}" *
	}

	FUNCTION {format.incoll.inproc.crossref}
	{ editor empty$
	editor field.or.null author field.or.null =
	or
	{ key empty$
	{ booktitle empty$
	{ "need editor, key, or booktitle for " cite$ * " to crossref " *
	crossref * warning$
	""
	}
	{ "In {\em " booktitle * "\/}" * }
	if$
	}
	{ "In " key * }
	if$
	}
	{ "In " format.crossref.editor * }
	if$
	" \cite{" * crossref * "}" *
	}

	FUNCTION {article}
	{ output.bibitem
	format.authors "author" output.check
	new.block
	format.title "title" output.check
	new.block
	crossref missing$
	{ journal emphasize "journal" output.check
	format.vol.num.pages output
	format.date "year" output.check
	}
	{ format.article.crossref output.nonnull
	format.pages output
	}
	if$
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {book}
	{ output.bibitem
	author empty$
	{ format.editors "author and editor" output.check }
	{ format.authors output.nonnull
	crossref missing$
	{ "author and editor" editor either.or.check }
	'skip$
	if$
	}
	if$
	new.block
	format.btitle "title" output.check
	crossref missing$
	{ format.bvolume output
	new.block
	format.number.series output
	new.sentence
	publisher "publisher" output.check
	address output
	}
	{ new.block
	format.book.crossref output.nonnull
	}
	if$
	format.edition output
	format.date "year" output.check
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {booklet}
	{ output.bibitem
	format.authors output
	new.block
	format.title "title" output.check
	howpublished address new.block.checkb
	howpublished output
	address output
	format.date output
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {inbook}
	{ output.bibitem
	author empty$
	{ format.editors "author and editor" output.check }
	{ format.authors output.nonnull
	crossref missing$
	{ "author and editor" editor either.or.check }
	'skip$
	if$
	}
	if$
	new.block
	format.btitle "title" output.check
	crossref missing$
	{ format.bvolume output
	format.chapter.pages "chapter and pages" output.check
	new.block
	format.number.series output
	new.sentence
	publisher "publisher" output.check
	address output
	}
	{ format.chapter.pages "chapter and pages" output.check
	new.block
	format.book.crossref output.nonnull
	}
	if$
	format.edition output
	format.date "year" output.check
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {incollection}
	{ output.bibitem
	format.authors "author" output.check
	new.block
	format.title "title" output.check
	new.block
	crossref missing$
	{ format.in.ed.booktitle "booktitle" output.check
	format.bvolume output
	format.number.series output
	format.chapter.pages output
	new.sentence
	publisher "publisher" output.check
	address output
	format.edition output
	format.date "year" output.check
	}
	{ format.incoll.inproc.crossref output.nonnull
	format.chapter.pages output
	}
	if$
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {inproceedings}
	{ output.bibitem
	format.authors "author" output.check
	new.block
	format.title "title" output.check
	new.block
	crossref missing$
	{ format.in.ed.booktitle "booktitle" output.check
	format.bvolume output
	format.number.series output
	format.pages output
	address empty$
	{ organization publisher new.sentence.checkb
	organization output
	publisher output
	format.date "year" output.check
	}
	{ address output.nonnull
	format.date "year" output.check
	new.sentence
	organization output
	publisher output
	}
	if$
	}
	{ format.incoll.inproc.crossref output.nonnull
	format.pages output
	}
	if$
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {conference} { inproceedings }

	FUNCTION {manual}
	{ output.bibitem
	author empty$
	{ organization empty$
	'skip$
	{ organization output.nonnull
	address output
	}
	if$
	}
	{ format.authors output.nonnull }
	if$
	new.block
	format.btitle "title" output.check
	author empty$
	{ organization empty$
	{ address new.block.checka
	address output
	}
	'skip$
	if$
	}
	{ organization address new.block.checkb
	organization output
	address output
	}
	if$
	format.edition output
	format.date output
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {mastersthesis}
	{ output.bibitem
	format.authors "author" output.check
	new.block
	format.title "title" output.check
	new.block
	"Master's thesis" format.thesis.type output.nonnull
	school "school" output.check
	address output
	format.date "year" output.check
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {misc}
	{ output.bibitem
	format.authors output
	title howpublished new.block.checkb
	format.title output
	howpublished new.block.checka
	howpublished output
	format.date output
	format.eprint output
	new.block
	note output
	fin.entry
	empty.misc.check
	}

	FUNCTION {phdthesis}
	{ output.bibitem
	format.authors "author" output.check
	new.block
	format.btitle "title" output.check
	new.block
	"PhD thesis" format.thesis.type output.nonnull
	school "school" output.check
	address output
	format.date "year" output.check
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {proceedings}
	{ output.bibitem
	editor empty$
	{ organization output }
	{ format.editors output.nonnull }
	if$
	new.block
	format.btitle "title" output.check
	format.bvolume output
	format.number.series output
	address empty$
	{ editor empty$
	{ publisher new.sentence.checka }
	{ organization publisher new.sentence.checkb
	organization output
	}
	if$
	publisher output
	format.date "year" output.check
	}
	{ address output.nonnull
	format.date "year" output.check
	new.sentence
	editor empty$
	'skip$
	{ organization output }
	if$
	publisher output
	}
	if$
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {techreport}
	{ output.bibitem
	format.authors "author" output.check
	new.block
	format.title "title" output.check
	new.block
	format.tr.number output.nonnull
	institution "institution" output.check
	address output
	format.date "year" output.check
	format.eprint output
	new.block
	note output
	fin.entry
	}

	FUNCTION {unpublished}
	{ output.bibitem
	format.authors "author" output.check
	new.block
	format.title "title" output.check
	new.block
	note "note" output.check
	format.date output
	format.eprint output
	fin.entry
	}

	FUNCTION {default.type} { misc }

	MACRO {jan} {"January"}

	MACRO {feb} {"February"}

	MACRO {mar} {"March"}

	MACRO {apr} {"April"}

	MACRO {may} {"May"}

	MACRO {jun} {"June"}

	MACRO {jul} {"July"}

	MACRO {aug} {"August"}

	MACRO {sep} {"September"}

	MACRO {oct} {"October"}

	MACRO {nov} {"November"}

	MACRO {dec} {"December"}

	MACRO {acmcs} {"ACM Computing Surveys"}

	MACRO {acta} {"Acta Informatica"}

	MACRO {cacm} {"Communications of the ACM"}

	MACRO {ibmjrd} {"IBM Journal of Research and Development"}

	MACRO {ibmsj} {"IBM Systems Journal"}

	MACRO {ieeese} {"IEEE Transactions on Software Engineering"}

	MACRO {ieeetc} {"IEEE Transactions on Computers"}

	MACRO {ieeetcad}
	{"IEEE Transactions on Computer-Aided Design of Integrated Circuits"}

	MACRO {ipl} {"Information Processing Letters"}

	MACRO {jacm} {"Journal of the ACM"}

	MACRO {jcss} {"Journal of Computer and System Sciences"}

	MACRO {scp} {"Science of Computer Programming"}

	MACRO {sicomp} {"SIAM Journal on Computing"}

	MACRO {tocs} {"ACM Transactions on Computer Systems"}

	MACRO {tods} {"ACM Transactions on Database Systems"}

	MACRO {tog} {"ACM Transactions on Graphics"}

	MACRO {toms} {"ACM Transactions on Mathematical Software"}

	MACRO {toois} {"ACM Transactions on Office Information Systems"}

	MACRO {toplas} {"ACM Transactions on Programming Languages and Systems"}

	MACRO {tcs} {"Theoretical Computer Science"}

	READ

	FUNCTION {sortify}
	{ purify$
	"l" change.case$
	}

	INTEGERS { len }

	FUNCTION {chop.word}
	{ 's :=
	'len :=
	s #1 len substring$ =
	{ s len #1 + global.max$ substring$ }
	's
	if$
	}

	INTEGERS { et.al.char.used }

	FUNCTION {initialize.et.al.char.used}
	{ #0 'et.al.char.used :=
	}

	EXECUTE {initialize.et.al.char.used}

	FUNCTION {format.lab.names}
	{ 's :=
	s num.names$ 'numnames :=
	numnames #1 >
	{ numnames #4 >
	{ #3 'namesleft := }
	{ numnames 'namesleft := }
	if$
	#1 'nameptr :=
	""
	{ namesleft #0 > }
	{ nameptr numnames =
	{ s nameptr "{ff }{vv }{ll}{ jj}" format.name$ "others" =
	{ "{\etalchar{+}}" *
	#1 'et.al.char.used :=
	}
	{ s nameptr "{v{}}{l{}}" format.name$ * }
	if$
	}
	{ s nameptr "{v{}}{l{}}" format.name$ * }
	if$
	nameptr #1 + 'nameptr :=
	namesleft #1 - 'namesleft :=
	}
	while$
	numnames #4 >
	{ "{\etalchar{+}}" *
	#1 'et.al.char.used :=
	}
	'skip$
	if$
	}
	{ s #1 "{v{}}{l{}}" format.name$
	duplicate$ text.length$ #2 <
	{ pop$ s #1 "{ll}" format.name$ #3 text.prefix$ }
	'skip$
	if$
	}
	if$
	}

	FUNCTION {author.key.label}
	{ author empty$
	{ key empty$
	{ cite$ #1 #3 substring$ }
	{ key #3 text.prefix$ }
	if$
	}
	{ author format.lab.names }
	if$
	}

	FUNCTION {author.editor.key.label}
	{ author empty$
	{ editor empty$
	{ key empty$
	{ cite$ #1 #3 substring$ }
	{ key #3 text.prefix$ }
	if$
	}
	{ editor format.lab.names }
	if$
	}
	{ author format.lab.names }
	if$
	}

	FUNCTION {author.key.organization.label}
	{ author empty$
	{ key empty$
	{ organization empty$
	{ cite$ #1 #3 substring$ }
	{ "The " #4 organization chop.word #3 text.prefix$ }
	if$
	}
	{ key #3 text.prefix$ }
	if$
	}
	{ author format.lab.names }
	if$
	}

	FUNCTION {editor.key.organization.label}
	{ editor empty$
	{ key empty$
	{ organization empty$
	{ cite$ #1 #3 substring$ }
	{ "The " #4 organization chop.word #3 text.prefix$ }
	if$
	}
	{ key #3 text.prefix$ }
	if$
	}
	{ editor format.lab.names }
	if$
	}

	FUNCTION {calc.label}
	{ type$ "book" =
	type$ "inbook" =
	or
	'author.editor.key.label
	{ type$ "proceedings" =
	'editor.key.organization.label
	{ type$ "manual" =
	'author.key.organization.label
	'author.key.label
	if$
	}
	if$
	}
	if$
	duplicate$
	year field.or.null purify$ #-1 #2 substring$
	*
	'label :=
	year field.or.null purify$ #-1 #4 substring$
	*
	sortify 'sort.label :=
	}

	FUNCTION {sort.format.names}
	{ 's :=
	#1 'nameptr :=
	""
	s num.names$ 'numnames :=
	numnames 'namesleft :=
	{ namesleft #0 > }
	{ nameptr #1 >
	{ " " * }
	'skip$
	if$
	s nameptr "{vv{ } }{ll{ }}{ ff{ }}{ jj{ }}" format.name$ 't :=
	nameptr numnames = t "others" = and
	{ "et al" * }
	{ t sortify * }
	if$
	nameptr #1 + 'nameptr :=
	namesleft #1 - 'namesleft :=
	}
	while$
	}

	FUNCTION {sort.format.title}
	{ 't :=
	"A " #2
	"An " #3
	"The " #4 t chop.word
	chop.word
	chop.word
	sortify
	#1 global.max$ substring$
	}

	FUNCTION {author.sort}
	{ author empty$
	{ key empty$
	{ "to sort, need author or key in " cite$ * warning$
	""
	}
	{ key sortify }
	if$
	}
	{ author sort.format.names }
	if$
	}

	FUNCTION {author.editor.sort}
	{ author empty$
	{ editor empty$
	{ key empty$
	{ "to sort, need author, editor, or key in " cite$ * warning$
	""
	}
	{ key sortify }
	if$
	}
	{ editor sort.format.names }
	if$
	}
	{ author sort.format.names }
	if$
	}

	FUNCTION {author.organization.sort}
	{ author empty$
	{ organization empty$
	{ key empty$
	{ "to sort, need author, organization, or key in " cite$ * warning$
	""
	}
	{ key sortify }
	if$
	}
	{ "The " #4 organization chop.word sortify }
	if$
	}
	{ author sort.format.names }
	if$
	}

	FUNCTION {editor.organization.sort}
	{ editor empty$
	{ organization empty$
	{ key empty$
	{ "to sort, need editor, organization, or key in " cite$ * warning$
	""
	}
	{ key sortify }
	if$
	}
	{ "The " #4 organization chop.word sortify }
	if$
	}
	{ editor sort.format.names }
	if$
	}

	FUNCTION {presort}
	{ calc.label
	sort.label
	" "
	*
	type$ "book" =
	type$ "inbook" =
	or
	'author.editor.sort
	{ type$ "proceedings" =
	'editor.organization.sort
	{ type$ "manual" =
	'author.organization.sort
	'author.sort
	if$
	}
	if$
	}
	if$
	*
	" "
	*
	year field.or.null sortify
	*
	" "
	*
	title field.or.null
	sort.format.title
	*
	#1 entry.max$ substring$
	'sort.key$ :=
	}

	ITERATE {presort}

	SORT

	STRINGS { longest.label last.sort.label next.extra }

	INTEGERS { longest.label.width last.extra.num }

	FUNCTION {initialize.longest.label}
	{ "" 'longest.label :=
	#0 int.to.chr$ 'last.sort.label :=
	"" 'next.extra :=
	#0 'longest.label.width :=
	#0 'last.extra.num :=
	}

	FUNCTION {forward.pass}
	{ last.sort.label sort.label =
	{ last.extra.num #1 + 'last.extra.num :=
	last.extra.num int.to.chr$ 'extra.label :=
	}
	{ "a" chr.to.int$ 'last.extra.num :=
	"" 'extra.label :=
	sort.label 'last.sort.label :=
	}
	if$
	}

	FUNCTION {reverse.pass}
	{ next.extra "b" =
	{ "a" 'extra.label := }
	'skip$
	if$
	label extra.label * 'label :=
	label width$ longest.label.width >
	{ label 'longest.label :=
	label width$ 'longest.label.width :=
	}
	'skip$
	if$
	extra.label 'next.extra :=
	}

	EXECUTE {initialize.longest.label}

	ITERATE {forward.pass}

	REVERSE {reverse.pass}

	FUNCTION {begin.bib}
	{ et.al.char.used
	{ "\newcommand{\etalchar}[1]{$^{#1}$}" write$ newline$ }
	'skip$
	if$
	preamble$ empty$
	'skip$
	{ preamble$ write$ newline$ }
	if$
	"\begin{thebibliography}{" longest.label * "}" * write$ newline$
	}

	EXECUTE {begin.bib}

	EXECUTE {init.state.consts}

	ITERATE {call.type$}

	FUNCTION {end.bib}
	{ newline$
	"\end{thebibliography}" write$ newline$
	}

	EXECUTE {end.bib}