Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1984__34_2_a10, author = {\v{S}ulka, Robert}, title = {On three lattices that belong to every semigroup}, journal = {Mathematica slovaca}, pages = {217--228}, publisher = {mathdoc}, volume = {34}, number = {2}, year = {1984}, mrnumber = {744956}, zbl = {0597.20053}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1984__34_2_a10/} }
Šulka, Robert. On three lattices that belong to every semigroup. Mathematica slovaca, Tome 34 (1984) no. 2, pp. 217-228. http://geodesic.mathdoc.fr/item/MASLO_1984__34_2_a10/