@article{IVM_1968_8_a1,
     author = {Ya. G. Berkovich},
     title = {A~condition which is necessary for a~group to coincide with the commutant.},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {11--17},
     publisher = {mathdoc},
     number = {8},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1968_8_a1/}
}