Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_2006__56_1_a8, author = {Jakub{\'\i}kov\'a-Studenovsk\'a, Danica}, title = {Retracts of monounary algebras corresponding to groupoids}, journal = {Mathematica slovaca}, pages = {105--112}, publisher = {mathdoc}, volume = {56}, number = {1}, year = {2006}, mrnumber = {2217583}, zbl = {1164.08304}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_2006__56_1_a8/} }
Jakubíková-Studenovská, Danica. Retracts of monounary algebras corresponding to groupoids. Mathematica slovaca, Tome 56 (2006) no. 1, pp. 105-112. http://geodesic.mathdoc.fr/item/MASLO_2006__56_1_a8/