@article{Williams:2004ma,
  author = "Williams, Floyd",
  title = "{On Solitons, Non-Linear Sigma-Models, and Two-Dimensional Gravity}",
  doi = "10.22323/1.013.0003",
  journal = "PoS",
  year = 2004,
  volume = "WC2004",
  pages = "003"
}