Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMJ_1998__48_4_a9, author = {Nochefranca, L. and Shum, K. P.}, title = {Pseudo-symmetric ideals of semigroup and their radicals}, journal = {Czechoslovak Mathematical Journal}, pages = {727--735}, publisher = {mathdoc}, volume = {48}, number = {4}, year = {1998}, mrnumber = {1658253}, zbl = {0954.20036}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMJ_1998__48_4_a9/} }
Nochefranca, L.; Shum, K. P. Pseudo-symmetric ideals of semigroup and their radicals. Czechoslovak Mathematical Journal, Tome 48 (1998) no. 4, pp. 727-735. http://geodesic.mathdoc.fr/item/CMJ_1998__48_4_a9/