Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1990_29_1_a3, author = {A. M. Nurakunov}, title = {Quasivarieties of algebras with definable principal}, journal = {Algebra i logika}, pages = {35--46}, publisher = {mathdoc}, volume = {29}, number = {1}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1990_29_1_a3/} }
A. M. Nurakunov. Quasivarieties of algebras with definable principal. Algebra i logika, Tome 29 (1990) no. 1, pp. 35-46. http://geodesic.mathdoc.fr/item/AL_1990_29_1_a3/