@article{106070, author = {Jaroslav Je\v zek and Tom\'a\v s Kepka}, title = {Free entropic groupoids}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {022}, year = {1981}, pages = {223-233}, zbl = {0464.08004}, mrnumber = {620359}, language = {en}, url = {http://dml.mathdoc.fr/item/106070} }
Ježek, Jaroslav; Kepka, Tomáš. Free entropic groupoids. Commentationes Mathematicae Universitatis Carolinae, Tome 022 (1981) pp. 223-233. http://gdmltest.u-ga.fr/item/106070/
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