Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1975__25_2_a11, author = {Lal, Harbans}, title = {The {Regular} {Ideal} in a {Semigroup}}, journal = {Mathematica slovaca}, pages = {179--183}, publisher = {mathdoc}, volume = {25}, number = {2}, year = {1975}, mrnumber = {0396807}, zbl = {0303.20045}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1975__25_2_a11/} }
Lal, Harbans. The Regular Ideal in a Semigroup. Mathematica slovaca, Tome 25 (1975) no. 2, pp. 179-183. http://geodesic.mathdoc.fr/item/MASLO_1975__25_2_a11/