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Ježek, Jaroslav ; Kepka, Tomáš
Semigroup representations of medial groupoids. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 22 (1981), issue 3, pp. 513-524
MSC: 08A05, 20L99, 20M14, 20M99, 20N05 | MR 633579 | Zbl 0492.08001
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