@article{MZM_1970_8_3_a9,
     author = {V. M. Kotlov},
     title = {Torsion-free groups with factor-groups on their hypercenter which are periodic},
     journal = {Matemati\v{c}eskie zametki},
     pages = {373--383},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1970_8_3_a9/}
}