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@article{DAN_1961_138_2_a2, author = {V. P. Gromyko}, title = {A criterion for a $\pi d$-group to be special}, journal = {Doklady Akademii Nauk}, pages = {261--262}, publisher = {mathdoc}, volume = {138}, number = {2}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_138_2_a2/} }
V. P. Gromyko. A criterion for a $\pi d$-group to be special. Doklady Akademii Nauk, Tome 138 (1961) no. 2, pp. 261-262. http://geodesic.mathdoc.fr/item/DAN_1961_138_2_a2/