Hat mitgewirkt an:
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Flow visualization, 3.. September 6 - 9, 1983, Univ. of Michigan, Ann Arbor, Michigan, USA
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Algebraic geometry, 3.. Held at the University of Michigan, Ann Arbor, USA, November 14 - 15, 1981
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Mathematical computation with Maple V : ideas and aplications ; proceedings of the Maple Summer Workshop and Symposium, University of Michigan, Ann Arbor, June 28 - 30, 1993
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The Second Workshop on Grand Unification : Univ. of Michigan, Ann Arbor, April 24 - 26, 1981