@Article{         Pair,
  Author        = "Pair, Claude",
  date-added    = "2014-01-27 14:18:41 +0000",
  date-modified = "2014-01-27 14:19:00 +0000",
  Journal       = "Algol Bulletin",
  Title         = "Concerning the Syntax of ALGOL 68",
  Volume        = "31",
  Year          = "1970",
  bdsk-url-1    = "http://www.ens-lyon.fr/LIP/REWRITING/TYPES\_AND\_L\_CALCULUS/RecursiveTypes/",
  File          = "Concerning the Syntax of ALGOL 68 - Pair (0) (0) - a - a - z.pdf"
}

@Article{ Pair, Author = "Pair, Claude", date-added = "2014-01-27 14:18:41 +0000", date-modified = "2014-01-27 14:19:00 +0000", Journal = "Algol Bulletin", Title = "Concerning the Syntax of ALGOL 68", Volume = "31", Year = "1970", bdsk-url-1 = "http://www.ens-lyon.fr/LIP/REWRITING/TYPES_AND_L_CALCULUS/RecursiveTypes/", File = "Concerning the Syntax of ALGOL 68 - Pair (0) (0) - a - a - z.pdf" }