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@article{AL_1978_17_4_a1, author = {A. F. Krasnikov}, title = {Nilpotent subgroups of relatively free groups}, journal = {Algebra i logika}, pages = {389--401}, publisher = {mathdoc}, volume = {17}, number = {4}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1978_17_4_a1/} }
A. F. Krasnikov. Nilpotent subgroups of relatively free groups. Algebra i logika, Tome 17 (1978) no. 4, pp. 389-401. http://geodesic.mathdoc.fr/item/AL_1978_17_4_a1/