@InBook{know_rep_ai,
  author = 	 {Han Reichgelt},
  title = 	 {Knowlege Representation: An AI Perspective},
  chapter = 	 4,
  publisher = 	 {\textsc{A}blex \textsc{P}ublishing \textsc{C}orporation \textsc{N}orwood \textsc{N}ew \textsc{J}ersey},
  year = 	 1991,
  editor =	 {\textsc{A}rtificial \textsc{I}ntelligence \textsc{G}roup in the \textsc{D}ept of \textsc{P}sychology \textsc{U}niversity of \textsc{N}ottingham in \textsc{E}ngland},
  edition =	 1
}


@InBook{zadeh65,
  author = 	 {L A Zadeh},
  title = 	 {Information and Control},
  chapter = 	 8,
  publisher = 	 {Fuzzy Sets},
  year = 	 1965,
  pages =	 {338-353}
}

@Book{know_rep,
  author = 	 {Hector J. Levesque},
  title = 	 {Knowlege Representation},
  publisher = 	 {\textsc{A} \textsc{B}radford \textsc{B}ook of \textsc{T}he \textsc{MIT} \textsc{P}ress},
  year = 	 1992,
  editor =	 {Ronald J. Brachman and Hector J.Levesque and Raymod Reiter}
}

@Book{rep_uncertain_know,
  author = 	 {Paul Krause and Dominic Clark},
  title = 	 {Representing Uncertain Knowledge an Artificial Intelligetnce Approach},
  publisher = 	 {intellect},
  year = 	 1993
}