Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1987__37_2_a1, author = {\v{S}ulka, Robert}, title = {Nilpotency in semigroups and sublattices of their {Booleans}}, journal = {Mathematica slovaca}, pages = {147--158}, publisher = {mathdoc}, volume = {37}, number = {2}, year = {1987}, mrnumber = {899430}, zbl = {0616.20033}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1987__37_2_a1/} }
Šulka, Robert. Nilpotency in semigroups and sublattices of their Booleans. Mathematica slovaca, Tome 37 (1987) no. 2, pp. 147-158. http://geodesic.mathdoc.fr/item/MASLO_1987__37_2_a1/