@article{TRSPY_2011_274_a2,
     author = {V. S. Atabekyan},
     title = {On normal subgroups in the periodic products of {S.} {I.~Adian}},
     journal = {Informatics and Automation},
     pages = {15--31},
     year = {2011},
     volume = {274},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2011_274_a2/}
}