Serving for International Conferences
- Member of the organizing comitee of ICALP '92 (Vienna)
- Member of the programme comitee of ICALP '94 (Israel)
- Co-organizer of "Average-case Analysis of Algorithms", Schloß Dagstuhl, 1993
- Co-organizer of "Average-case Analysis of Algorithms", Schloß Dagstuhl, 1995
- Co-organizer of "Average-case Analysis of Algorithms", Schloß Dagstuhl, 1997
- Member of the organizing comitee of the 7th Fibonacci Conference and Applications
(Graz, Austria), 1996
- Member of the organizing comitee of Formal Power Series and Algebraic Combinatorics,
Vienna, 1997