Generalized mappings between fuzzy topological spaces. Kandil, A.; Kerre, E.E.; Nouh, A.A.; El-Shafei, M.E. — 1992 Mathematica Pannonica
Characterization of binary operations on the unit interval satisfying the generalized modus ponens inference rule. Cappelle, B.; Kerre, E.E.; Da, Ruan; Vanmassenhove, F.R. — 1991 Mathematica Pannonica