@article{ZNSL_1999_265_a0,
     author = {A. V. Blazhenov},
     title = {On the self-cancellation of torsion-free abelian groups of finite rank},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {7--10},
     year = {1999},
     volume = {265},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1999_265_a0/}
}