Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1964__5_1_a3, author = {Hu\v{s}ek, Miroslav}, title = {$S$-categories}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {37--46}, publisher = {mathdoc}, volume = {05}, number = {1}, year = {1964}, mrnumber = {0174027}, zbl = {0136.19101}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1964__5_1_a3/} }
Hušek, Miroslav. $S$-categories. Commentationes Mathematicae Universitatis Carolinae, Tome 05 (1964) no. 1, pp. 37-46. http://geodesic.mathdoc.fr/item/CMUC_1964__5_1_a3/