%0 Journal Article %A A. M. Sebel'din %T Definability of separable torsion-free abelian groups by %J Algebra i logika %D 1995 %P 523-530 %V 34 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1995_34_5_a2/ %G ru %F AL_1995_34_5_a2