@article{105772, author = {Tom\'a\v s Kepka}, title = {Epimorphisms in some groupoid varieties}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {018}, year = {1977}, pages = {265-279}, zbl = {0357.08002}, mrnumber = {0439714}, language = {en}, url = {http://dml.mathdoc.fr/item/105772} }
Kepka, Tomáš. Epimorphisms in some groupoid varieties. Commentationes Mathematicae Universitatis Carolinae, Tome 018 (1977) pp. 265-279. http://gdmltest.u-ga.fr/item/105772/
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