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@article{MZM_1971_10_4_a7, author = {V. M. Sitnikov}, title = {Finite groups with $2$-closed or $2'$-closed centralizers of involutions}, journal = {Matemati\v{c}eskie zametki}, pages = {437--446}, publisher = {mathdoc}, volume = {10}, number = {4}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1971_10_4_a7/} }
V. M. Sitnikov. Finite groups with $2$-closed or $2'$-closed centralizers of involutions. Matematičeskie zametki, Tome 10 (1971) no. 4, pp. 437-446. http://geodesic.mathdoc.fr/item/MZM_1971_10_4_a7/