@article{AL_1999_38_3_a2,
     author = {A. V. Zavarnitsin and V. D. Mazurov},
     title = {Element orders in coverings of symmetric and alternating},
     journal = {Algebra i logika},
     pages = {296--315},
     publisher = {mathdoc},
     volume = {38},
     number = {3},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1999_38_3_a2/}
}