@book{latex-by-lamport,
author =      "Leslie Lamport",
title =       "A Document Preparation System {Latex} User's Guide and Reference Manual",
publisher =   "Addison-Wesley",
year =        1986
}

@book{latex-companion,
 author =      "Michel Goossens and Frank Mittelbach and Alexander Samarin",
 title =       "The {LaTeX} Companion",
 publisher =   "Addison-Wesley",
 year =        1994
}