@article{MetrisabilityCriteria,
  title = "Criteria for metrisability",
  author = "A. W. Roscoe and P.J. Collins",
  year = "1984",
  journal = "{Proc. Amer. Math. Soc.}",
  month = "April",
  number = "90",
  pages = "631-640",
  url = "http://www.jstor.org/view/00029939/di970918/97p0476c/0",
}