@article{AL_2018_57_1_a1,
     author = {W. Guo and D. O. Revin},
     title = {Maximal and submaximal $\mathfrak X$-subgroups},
     journal = {Algebra i logika},
     pages = {14--42},
     publisher = {mathdoc},
     volume = {57},
     number = {1},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2018_57_1_a1/}
}