Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1968__18_2_a8, author = {\v{S}ulka, Robert}, title = {On the {Nilpotency} in {Semigroups}}, journal = {Mathematica slovaca}, pages = {148--157}, publisher = {mathdoc}, volume = {18}, number = {2}, year = {1968}, mrnumber = {0242979}, zbl = {0159.02701}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1968__18_2_a8/} }
Šulka, Robert. On the Nilpotency in Semigroups. Mathematica slovaca, Tome 18 (1968) no. 2, pp. 148-157. http://geodesic.mathdoc.fr/item/MASLO_1968__18_2_a8/