Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1967__8_4_a10, author = {Sichler, Ji\v{r}{\'\i}}, title = {Category of commutative groupoids is binding}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {753--755}, publisher = {mathdoc}, volume = {08}, number = {4}, year = {1967}, mrnumber = {0228400}, zbl = {0168.26703}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1967__8_4_a10/} }
Sichler, Jiří. Category of commutative groupoids is binding. Commentationes Mathematicae Universitatis Carolinae, Tome 08 (1967) no. 4, pp. 753-755. http://geodesic.mathdoc.fr/item/CMUC_1967__8_4_a10/