@article{AL_1995_34_5_a2,
     author = {A. M. Sebel'din},
     title = {Definability of separable torsion-free abelian groups by},
     journal = {Algebra i logika},
     pages = {523--530},
     publisher = {mathdoc},
     volume = {34},
     number = {5},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1995_34_5_a2/}
}