Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1981_29_3_a5, author = {A. I. Nekritsukhin}, title = {Approximation of free groups with respect to conjugacy}, journal = {Matemati\v{c}eskie zametki}, pages = {381--385}, publisher = {mathdoc}, volume = {29}, number = {3}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1981_29_3_a5/} }
A. I. Nekritsukhin. Approximation of free groups with respect to conjugacy. Matematičeskie zametki, Tome 29 (1981) no. 3, pp. 381-385. http://geodesic.mathdoc.fr/item/MZM_1981_29_3_a5/