%0 Journal Article %A V. M. Kotlov %T Torsion-free groups with factor-groups on their hypercenter which are periodic %J Matematičeskie zametki %D 1970 %P 373-383 %V 8 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1970_8_3_a9/ %G ru %F MZM_1970_8_3_a9