Mustafa Demirci. The vague sum and product of a finite number of real numbers in vague arithmetic. In Eduard Montseny, Pilar Sobrevilla, editors, Proceedings of the Joint 4th Conference of the European Society for Fuzzy Logic and Technology and the 11th Rencontres Francophones sur la Logique Floue et ses Applications, Barcelona, Spain, September 7-9, 2005. pages 745-750, Universidad Polytecnica de Catalunya, 2005. [doi]
Abstract is missing.