@inproceedings{Williams:2004ma,
  author = "Williams, Floyd",
  title = "{On Solitons, Non-Linear Sigma-Models, and Two-Dimensional Gravity}",
  doi = "10.22323/1.013.0003",
  booktitle = "Proceedings of Fourth International Winter Conference on Mathematical Methods in Physics {\textemdash} PoS(WC2004)",
  year = 2004,
  volume = "013",
  pages = "003"
}