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@article{IVM_1977_4_a10, author = {Ya. D. Polovitskii}, title = {Periodic groups with extremal classes of conjugate abelian subgroups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {95--101}, publisher = {mathdoc}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1977_4_a10/} }
Ya. D. Polovitskii. Periodic groups with extremal classes of conjugate abelian subgroups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1977), pp. 95-101. http://geodesic.mathdoc.fr/item/IVM_1977_4_a10/