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@article{AUCMP_1978__19_2_a6, author = {Kepka, Tom\'a\v{s}}, title = {Commutative distributive groupoids}, journal = {Acta Universitatis Carolinae. Mathematica et Physica}, pages = {45--58}, publisher = {mathdoc}, volume = {19}, number = {2}, year = {1978}, zbl = {0391.20055}, language = {en}, url = {http://geodesic.mathdoc.fr/item/AUCMP_1978__19_2_a6/} }
Kepka, Tomáš. Commutative distributive groupoids. Acta Universitatis Carolinae. Mathematica et Physica, Tome 19 (1978) no. 2, pp. 45-58. http://geodesic.mathdoc.fr/item/AUCMP_1978__19_2_a6/