@article{MR1724426,
  title = "A characterization of the {P}etersen-type geometry of the {M}c{L}aughlin group",
  author = "Baumeister, B. and Ivanov, A. A. and Pasechnik, D. V.",
  year = "2000",
  issn = "0305-0041",
  journal = "Math. Proc. Cambridge Philos. Soc.",
  mrnumber = "MR1724426 (2000j:20025)",
  number = "1",
  pages = "21--44",
  volume = "128",
}