@article{AL_1995_34_5_a0,
     author = {S. F. Kamornikov and L. A. Shemetkov},
     title = {On coradicals of subnormal subgroups},
     journal = {Algebra i logika},
     pages = {493--513},
     publisher = {mathdoc},
     volume = {34},
     number = {5},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1995_34_5_a0/}
}