@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/}
}