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@Book{            hottbook,
  Author        = "{Univalent Foundations Program}, The",
  Address       = "Institute for Advanced Study",
  date-added    = "2020-04-10 11:07:26 +0200",
  date-modified = "2020-04-10 11:07:26 +0200",
  Keywords      = "homotopy type theory and type theory",
  Publisher     = "\url{https://homotopytypetheory.org/book}",
  Title         = "Homotopy Type Theory: Univalent Foundations of Mathematics",
  Year          = "2013",
  File          = "hott-online-1204-g7415493 (0) - a - a.pdf",
  file-2        = "Homotopy Type Theory Univalent Foundations of Mathematics - Univalent Foundations Program (0) (0) - a - a.pdf"
}

@Book{ hottbook, Author = "{Univalent Foundations Program}, The", Address = "Institute for Advanced Study", date-added = "2020-04-10 11:07:26 +0200", date-modified = "2020-04-10 11:07:26 +0200", Keywords = "homotopy type theory and type theory", Publisher = "\url{https://homotopytypetheory.org/book}", Title = "Homotopy Type Theory: Univalent Foundations of Mathematics", Year = "2013", File = "hott-online-1204-g7415493 (0) - a - a.pdf", file-2 = "Homotopy Type Theory Univalent Foundations of Mathematics - Univalent Foundations Program (0) (0) - a - a.pdf" }