Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1973__14_3_a1, author = {H\'ajek, Petr}, title = {Why semisets?}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {397--420}, publisher = {mathdoc}, volume = {14}, number = {3}, year = {1973}, mrnumber = {0342393}, zbl = {0268.02005}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1973__14_3_a1/} }
Hájek, Petr. Why semisets?. Commentationes Mathematicae Universitatis Carolinae, Tome 14 (1973) no. 3, pp. 397-420. http://geodesic.mathdoc.fr/item/CMUC_1973__14_3_a1/