@article{VTGU_2013_3_a7,
     author = {A. R. Chekhlov},
     title = {On direct sums of cyclic groups with invariant monomorphisms},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {60--65},
     year = {2013},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2013_3_a7/}
}