@article{PFMT_2010_4_a6,
     author = {A. N. Skiba},
     title = {On the $SE$-core of subgroups of a finite group},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {39--45},
     year = {2010},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2010_4_a6/}
}