@article{MZM_1976_19_5_a6,
     author = {V. A. Abrashkin},
     title = {2-Divisible groups over~$Z$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {717--726},
     year = {1976},
     volume = {19},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1976_19_5_a6/}
}