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@article{AL_1962_1_1_a0, author = {M. I. Kargapolov}, title = {On the $\pi $-completion of locally nilpotent groups}, journal = {Algebra i logika}, pages = {5--13}, publisher = {mathdoc}, volume = {1}, number = {1}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1962_1_1_a0/} }
M. I. Kargapolov. On the $\pi $-completion of locally nilpotent groups. Algebra i logika, Tome 1 (1962) no. 1, pp. 5-13. http://geodesic.mathdoc.fr/item/AL_1962_1_1_a0/