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@article{IVM_1997_11_a1, author = {A. F. Vasil'ev and T. I. Vasilyeva}, title = {On finite groups whose principal factors are simple groups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {10--14}, publisher = {mathdoc}, number = {11}, year = {1997}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1997_11_a1/} }
A. F. Vasil'ev; T. I. Vasilyeva. On finite groups whose principal factors are simple groups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1997), pp. 10-14. http://geodesic.mathdoc.fr/item/IVM_1997_11_a1/