Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1985__21_1_a1, author = {Chajda, Ivan}, title = {Varieties with tolerance and congruence extension property}, journal = {Archivum mathematicum}, pages = {5--12}, publisher = {mathdoc}, volume = {21}, number = {1}, year = {1985}, mrnumber = {818302}, zbl = {0575.08001}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1985__21_1_a1/} }
Chajda, Ivan. Varieties with tolerance and congruence extension property. Archivum mathematicum, Tome 21 (1985) no. 1, pp. 5-12. http://geodesic.mathdoc.fr/item/ARM_1985__21_1_a1/