@article{SimplyConnectedPolyhedra,
  title = "Characterisations of simply-connected finite polyhedra in 3-space",
  author = "A. W. Roscoe and T.Y. Kong",
  year = "1985",
  journal = "{Bull. London Math. Soc.}",
  month = "November",
  number = "17",
  pages = "575--578",
  url = "http://www.cs.ox.ac.uk/people/bill.roscoe/publications/12.pdf",
}