Some combinatorial problems, connected with product-isomorphisms of binary relations
A. E. Kipiani (1988)
Acta Universitatis Carolinae. Mathematica et Physica
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A. E. Kipiani (1988)
Acta Universitatis Carolinae. Mathematica et Physica
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František Neuman, Milan Sekanina (1965)
Czechoslovak Mathematical Journal
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Archivum Mathematicum
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