External Evaluator

1. Referee for Bulletin Mathématique Soc. Sc. Math. Roumanie (Bucharest) [since 1981 on], Gazeta Matematica [since 1976 on], JIPAM (Journal of Inequalities in Pure and Applied Mathematics) (Melbourne, Australia) [since 2002 on], SIAM J. Numer. Anal. [since 2002 on],

2. Occasionally referee fot C. R. Math. Rep. Acad. Sci. Canada, J. Logic, Language & Information.

3. Reviewer for Mathematical Reviews [from 1980 on], Zentralblatt für Mathematik [from 1985 on].