Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1981__22_2_a1, author = {Je\v{z}ek, Jaroslav and Kepka, Tom\'a\v{s}}, title = {Free entropic groupoids}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {223--233}, publisher = {mathdoc}, volume = {22}, number = {2}, year = {1981}, mrnumber = {620359}, zbl = {0464.08004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1981__22_2_a1/} }
Ježek, Jaroslav; Kepka, Tomáš. Free entropic groupoids. Commentationes Mathematicae Universitatis Carolinae, Tome 22 (1981) no. 2, pp. 223-233. http://geodesic.mathdoc.fr/item/CMUC_1981__22_2_a1/