Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1977__15_134238, author = {K. D. jr. Magill}, title = {Semigroups in which each -class contains at most one regular ...-class.}, journal = {Semigroup forum}, pages = {91--92}, publisher = {mathdoc}, volume = {15}, year = {1977}, zbl = {0372.54035}, url = {http://geodesic.mathdoc.fr/item/SF_1977__15_134238/} }
K. D. jr. Magill. Semigroups in which each -class contains at most one regular ...-class.. Semigroup forum, Tome 15 (1977), pp. 91-92. http://geodesic.mathdoc.fr/item/SF_1977__15_134238/