Zimmermann, H. (1991). Fuzzy set theory and its applications (2., rev. ed.). Kluwer.
Chicago Style (17th ed.) CitationZimmermann, Hans-Jürgen. Fuzzy Set Theory and Its Applications. 2., rev. ed. Boston [u.a.]: Kluwer, 1991.
MLA (9th ed.) CitationZimmermann, Hans-Jürgen. Fuzzy Set Theory and Its Applications. 2., rev. ed. Kluwer, 1991.
Warning: These citations may not always be 100% accurate.