@article{ANABALON:20098d,
  author = "ANABALON, Andres  and  Zanelli, Jorge  and  Willison, Steven",
  title = "{Topological roots of four dimensional gravity}",
  doi = "10.22323/1.049.0013",
  journal = "PoS",
  year = 2009,
  volume = "cargese",
  pages = "013"
}