Pattern Recognition Letters - Associate Editor, since 1982.

IEEE Transactions on Fuzzy Systems - Associate Editor, since 1993.

IEEE Transactions on Neural Networks - Associate Editor, 1994- 1997.

IEEE Trans. on Systems, Man and Cybernetics, Associate Editor, since 1998

Journal of Intelligent Manufacturing - Associate Editor, since 1991.

Fuzzy Sets and Systems - Editor, Technological Development Section, since 1992.

Handbook of Fuzzy Computation - Co-Editor in Chief, since 1994.

Int. Encyclopedia on Fuzzy Sets and Possibility Theory - Editorial Board, since 1994.

J. of Fuzzy Logic and Intelligent Systems (Korea) - member of Editorial Advisory Board, since 1995.

Regional Editor of Soft Computing Research Journal, since 1996.

Applied Mathematics and Computer Science - member of Editorial Board, since 1997.

Editor of Fuzzy Modelling: Paradigms and Practice, Kluwer Academic Press, 1996.

Editor of two special issues of Fuzzy Sets and Systems on fuzzy relational structures, 1995, vol. 72.

Editor of a special issue of Pattern Recognition Letters on fuzzy pattern recognition, 1996.

Editor of a Special Issue of Applied Mathematics and Computer Science on Computational Intelligence, 1996.

Editor of a special issue of Information Sciences on fuzzy algebraic structures in intelligent systems, 1997.

Editor of Fuzzy Evolutionary Computation, Kluwer Academic Press, 1997.

Handbook of Data Mining and Knowledge Discovery - member of Editorial Board, since 1997.