@article{VMUMM_1989_2_a2,
     author = {S. V. Ivanov},
     title = {Subgroups of free {Burnside} groups of odd composite period},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {7--11},
     year = {1989},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1989_2_a2/}
}