@software{xu2026pushanyletter,
  author = {Xu, Lixin},
  title = {Push Any Letter: A 2D Letter-Pushing Environment and Planning Baselines},
  year = {2026},
  version = {0.1.0},
  url = {https://github.com/DavidLXu/Push-Any-Letter}
}

@misc{xu2026pushanyletterdata,
  author = {Xu, Lixin},
  title = {Push Any Letter: Center-12 High-Friction Demonstrations},
  year = {2026},
  howpublished = {Hugging Face},
  note = {Version center24-friction14-v3, CC BY 4.0},
  url = {https://huggingface.co/datasets/DavidLXu/Push-Any-Letter}
}