Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1999__49_1_a4, author = {Katrno\v{s}ka, Franti\v{s}ek}, title = {On the center of a left {Jordan} groupoid}, journal = {Mathematica slovaca}, pages = {35--39}, publisher = {mathdoc}, volume = {49}, number = {1}, year = {1999}, mrnumber = {1804471}, zbl = {0944.06005}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1999__49_1_a4/} }
Katrnoška, František. On the center of a left Jordan groupoid. Mathematica slovaca, Tome 49 (1999) no. 1, pp. 35-39. http://geodesic.mathdoc.fr/item/MASLO_1999__49_1_a4/