Kaufmann, A. 1911- Introduction to fuzzy arithmetic : theory and applications / Arnold Kaufmann, Madan M. Gupta. - New York : Van Nostrand Reinhold Co., 1985. - 351 p. : ill. ; 24 cm. - Van Nostrand Reinhold electrical/computer science and engineering series. . Includes index. Bibliography: p. 343-346. Subjects--Topical Terms: Fuzzy numbersFuzzy arithmetic