1991
- Mathematics , Algebra
Algebraic Geometry: Proceedings of the U. S.-U. S. S. R. Symposium Held in Chicago, June 20-July 14, 1989
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- Mathematics , Geometry and Topology
Algebraic Topology Poznań 1989: Proceedings of a Conference held in Poznań, Poland, June 22–27, 1989
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Computers , Algorithms and Data StructuresAlgorithms and Data Structures: 2nd Workshop, WADS ’91 Ottawa, Canada, August 14–16, 1991 Proceedings
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