Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1978__19_1_a8, author = {P\'alfy, P\'eter P\'al}, title = {On certain congruence lattices of finite unary algebras}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {89--95}, publisher = {mathdoc}, volume = {19}, number = {1}, year = {1978}, mrnumber = {0472656}, zbl = {0382.06007}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1978__19_1_a8/} }
Pálfy, Péter Pál. On certain congruence lattices of finite unary algebras. Commentationes Mathematicae Universitatis Carolinae, Tome 19 (1978) no. 1, pp. 89-95. http://geodesic.mathdoc.fr/item/CMUC_1978__19_1_a8/