Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1984__34_2_a8, author = {Goral\v{c}{\'\i}k, Pavel and Koubek, V\'aclav}, title = {On the right action hierarchy of semigroups}, journal = {Mathematica slovaca}, pages = {199--203}, publisher = {mathdoc}, volume = {34}, number = {2}, year = {1984}, mrnumber = {744954}, zbl = {0597.20056}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1984__34_2_a8/} }
Goralčík, Pavel; Koubek, Václav. On the right action hierarchy of semigroups. Mathematica slovaca, Tome 34 (1984) no. 2, pp. 199-203. http://geodesic.mathdoc.fr/item/MASLO_1984__34_2_a8/