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Ježek, Jaroslav ; Kepka, Tomáš
Permutable groupoids. (English). Czechoslovak Mathematical Journal, vol. 34 (1984), issue 3, pp. 396-410
MSC: 20L05 | MR 761422 | Zbl 0562.20037 | DOI: 10.21136/CMJ.1984.101965
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[3] T. Kepka: Regular mappings of groupoids. Acta Univ. Carolinae Math. Phys. 12/1 (1971), 25-37. MR 0320215
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[6] S. Tanaka: On $\Lambda $-commutative algebras. Math. Seminar Notes Kobe Univ. 3 (1975). MR 0419222 | Zbl 0324.02053
[7] H. Yutani: Quasi-commutative BCK-algebras and congruence relations. Math. Seminar Notes Kobe Univ. 5 (1977), 469-480. MR 0498112 | Zbl 0375.02053
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