Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1976_15_1_a3, author = {A. I. Budkin}, title = {Quasi-identities in a free group}, journal = {Algebra i logika}, pages = {39--52}, publisher = {mathdoc}, volume = {15}, number = {1}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1976_15_1_a3/} }
A. I. Budkin. Quasi-identities in a free group. Algebra i logika, Tome 15 (1976) no. 1, pp. 39-52. http://geodesic.mathdoc.fr/item/AL_1976_15_1_a3/