@article{AL_1970_9_3_a5,
     author = {V. D. Mazurov and V. M. Sitnikov and S. A. Syskin},
     title = {Finite groups whose solvable subgroups are $2$-closed or},
     journal = {Algebra i logika},
     pages = {313--341},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1970_9_3_a5/}
}