@article{MR1827737,
  title = "Extended {$F\sb 4$}-buildings and the {B}aby {M}onster",
  author = "Ivanov, A. A. and Pasechnik, D. V. and Shpectorov, S. V.",
  year = "2001",
  issn = "0020-9910",
  journal = "Invent. Math.",
  mrnumber = "MR1827737 (2002c:20026)",
  number = "2",
  pages = "399--433",
  volume = "144",
}