Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1968_4_3_a12, author = {D. I. Zaitsev}, title = {On the existence of stably nilpotent subgroups in locally nilpotent groups}, journal = {Matemati\v{c}eskie zametki}, pages = {361--368}, publisher = {mathdoc}, volume = {4}, number = {3}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1968_4_3_a12/} }
D. I. Zaitsev. On the existence of stably nilpotent subgroups in locally nilpotent groups. Matematičeskie zametki, Tome 4 (1968) no. 3, pp. 361-368. http://geodesic.mathdoc.fr/item/MZM_1968_4_3_a12/