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• Acta Universitatis Carolinae. Mathematica et Physica
• Volume 29

Author: Kipiani, A. E.

• Kipiani, A. E.: Some combinatorial problems, connected with product-isomorphisms of binary relations. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 29 (1988), issue 2, pp. 23-25