@article{IVM_1973_7_a0,
     author = {I. Kh. Bekker},
     title = {Groups of crossed homomorphisms of the automorphism groups of torsion-free abelian groups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--11},
     publisher = {mathdoc},
     number = {7},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1973_7_a0/}
}