@article{SEMR_2014_11_a20,
     author = {I. V. Khramtsov},
     title = {On finite non-simple $4$-primary groups},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {695--708},
     publisher = {mathdoc},
     volume = {11},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2014_11_a20/}
}