Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1999_38_1_a1, author = {Yu. L. Ershov}, title = {Uniformly small $\Delta^\ast$-groups}, journal = {Algebra i logika}, pages = {24--39}, publisher = {mathdoc}, volume = {38}, number = {1}, year = {1999}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1999_38_1_a1/} }
Yu. L. Ershov. Uniformly small $\Delta^\ast$-groups. Algebra i logika, Tome 38 (1999) no. 1, pp. 24-39. http://geodesic.mathdoc.fr/item/AL_1999_38_1_a1/