Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1959__139_160734, author = {G.B. PRESTON}, title = {Congruences on {Brandt} {Semigroups.}}, journal = {Mathematische Annalen}, pages = {91--94}, publisher = {mathdoc}, volume = {139}, year = {1959}, zbl = {0092.01803}, url = {http://geodesic.mathdoc.fr/item/MAN_1959__139_160734/} }
G.B. PRESTON. Congruences on Brandt Semigroups.. Mathematische Annalen, Tome 139 (1959), pp. 91-94. http://geodesic.mathdoc.fr/item/MAN_1959__139_160734/