Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1984__34_4_a1, author = {Fabrici, Imrich}, title = {Semigroups containing covered two-sided ideals}, journal = {Mathematica slovaca}, pages = {355--363}, publisher = {mathdoc}, volume = {34}, number = {4}, year = {1984}, mrnumber = {775242}, zbl = {0601.20056}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1984__34_4_a1/} }
Fabrici, Imrich. Semigroups containing covered two-sided ideals. Mathematica slovaca, Tome 34 (1984) no. 4, pp. 355-363. http://geodesic.mathdoc.fr/item/MASLO_1984__34_4_a1/