Fuzzy partial differential equations and relational equations : reservoir characterization and modeling / (ed.by) Masoud Nikravesh , Lofti A. Zadeh and Victor Korotkikh - New York Springer-Verlag Berlin 2004 - xiv, 347 p. Includes reference. ISBN: 3540203222 Subjects--Topical Terms: Petroleum engineering-mathematicsFuzzy mathematicsSoft computing Dewey Class. No.: 665.50151 / FUZ