1. An approach to uncertainty using algebras over a monoidal closed category;Cerruti;Rend. Circ. Mat. Palermo (2) Suppl.,1986
2. Vague groups;Demirci;J. Math. Anal. Appl.,1999
3. Fuzzy functions and their fundamental properties;Demirci;Fuzzy Sets and Systems,1999
4. Fuzzy Relational Equations and Their Applications to Knowledge Engineering;Di Nola,1989
5. Fuzzy Sets and Fuzzy Logic;Gottwald,1993