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Member of the editorial board of the following journals:
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Electronic Journal of Combinatorics
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The Maple Technical Newsletter
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Séminaire Lotharingien de Combinatoire.
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Editor (together with Dr. P. Paule, RISC Linz) of a special issue
Symbolic Computation in Combinatorics of the
Journal of Symbolic Computation,
published as vol.20, No. 5/6, november/december 1995.
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Editor (together with A. Kerber, Bayreuth, and J. Désarménien,
Marne-la-Vallée) of the
Foata Festschrift,
a special issue of the Electronic Journal of Combinatorics
at the occasion of the
60. birthday of D. Foata (published as vol. 3(2), february 1996).
http://www.zblmath.fiz-karlsruhe.de/e-journals/EJC/journalhome.html
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Referee für for the journals mentioned above and
the following journals
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Journal of Symbolic Computation
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Theoretical Computer Science
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European Journal of Combinatorics
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Discrete Mathematics
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Referee for the international conferences
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FPSAC-Formal Power Series and Algebraic Combinatorics
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ISSAC-International
Symposium on Symbolic and Algebraic Computation
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Reviewer for
Mathematical Reviews in sections 05 (Combinatorics)
and 86 (Computer Science).
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Book reviews for the
Jahresberichte der Deutschen Mathematiker
Vereinigung and Mathematical Reviews.