@article{DM_2006_18_1_a7,
     author = {M. M. Sorokina and M. A. Korpacheva},
     title = {On critical $\Omega$-fibered formations of finite groups},
     journal = {Diskretnaya Matematika},
     pages = {106--115},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2006_18_1_a7/}
}