
@book{ La85,
  author = {Lamport, Leslie},
  title = {\LaTeX: A Document Preparation System},
  publisher = {Addison-Wesley},
  year = {1985},
  isbn = {0-201-15790-X}
}

@manual{GAP4,
  key          = "GAP",
  organization = "The GAP Group",
  title        = {{GAP} -- {G}roups, {A}lgorithms, and 
                  {P}rogramming, Version 4.3},
  year         = 2002,
  address      = "Aachen, St~Andrews",
  note         = "https://www.gap-system.org",
  keywords     = "groups; *; gap; manual"
}


