Dubois, Didier. Fuzzy sets and systems : theory and applications / Didier Dubois, Henri Prade. - New York : Academic Press, 1980. - xvii, 393 p. : ill.; 24 cm. Includes bibliographies and indexes. ISBN: 9780122227509 Subjects--Topical Terms: Fuzzy sets. Fuzzy systems. Dewey Class. No.: 511.3 / FUZ