Medial division groupoids
Tomáš Kepka (1979)
Acta Universitatis Carolinae. Mathematica et Physica
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Tomáš Kepka (1979)
Acta Universitatis Carolinae. Mathematica et Physica
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Jung R. Cho, Jaroslav Ježek, Tomáš Kepka (1999)
Czechoslovak Mathematical Journal
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Tomáš Kepka (1981)
Acta Universitatis Carolinae. Mathematica et Physica
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