@article{VMUMM_1986_6_a14,
     author = {A. Yu. Ol'shanskii},
     title = {On the {Neumanns{\textendash}Shmel'kin} theorem},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {61--64},
     year = {1986},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1986_6_a14/}
}