@article{AL_2013_52_1_a1,
     author = {E. P. Vdovin and D. O. Revin},
     title = {Pronormality and strong pronormality of subgroups},
     journal = {Algebra i logika},
     pages = {22--33},
     publisher = {mathdoc},
     volume = {52},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2013_52_1_a1/}
}