Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1977__14_186379, author = {O. Steinfeld}, title = {A characterization of dual semigroups without nilpotent ideals.}, journal = {Semigroup forum}, pages = {1--6}, publisher = {mathdoc}, volume = {14}, year = {1977}, zbl = {0393.20045}, url = {http://geodesic.mathdoc.fr/item/SF_1977__14_186379/} }
O. Steinfeld. A characterization of dual semigroups without nilpotent ideals.. Semigroup forum, Tome 14 (1977), pp. 1-6. http://geodesic.mathdoc.fr/item/SF_1977__14_186379/