Zimmermann, H. 1. (1996). Fuzzy set theory and its applications (3rd ed.). Boston: Kluwer Academic Publishers.
Παραπομπή Chicago StyleZimmermann, H.-J. 1934-. Fuzzy Set Theory and Its Applications. 3rd ed. Boston: Kluwer Academic Publishers, 1996.
Παραπομπή MLAZimmermann, H.-J. 1934-. Fuzzy Set Theory and Its Applications. 3rd ed. Boston: Kluwer Academic Publishers, 1996.
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