@article{105177, author = {V\v era Trnkov\'a}, title = {Strong embedding of category of all groupoids into category of semigroups}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {009}, year = {1968}, pages = {251-256}, zbl = {0191.01302}, mrnumber = {0237394}, language = {en}, url = {http://dml.mathdoc.fr/item/105177} }
Trnková, Věra. Strong embedding of category of all groupoids into category of semigroups. Commentationes Mathematicae Universitatis Carolinae, Tome 009 (1968) pp. 251-256. http://gdmltest.u-ga.fr/item/105177/
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