@article{TIMM_2012_18_3_a14,
     author = {V. N. Knyagina and V. S. Monakhov},
     title = {On the permutability of $n$-maximal subgroups with {Schmidt} subgroups},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {125--130},
     year = {2012},
     volume = {18},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2012_18_3_a14/}
}