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@article{MZM_1989_45_3_a12, author = {I. R. Shafarevich}, title = {Factors of a descending central series}, journal = {Matemati\v{c}eskie zametki}, pages = {114--117}, publisher = {mathdoc}, volume = {45}, number = {3}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1989_45_3_a12/} }
I. R. Shafarevich. Factors of a descending central series. Matematičeskie zametki, Tome 45 (1989) no. 3, pp. 114-117. http://geodesic.mathdoc.fr/item/MZM_1989_45_3_a12/