%0 Journal Article %A Zakon, Elias %T Model-Completeness and Elementary Properties of Torsion Free Abelian Groups %J Canadian journal of mathematics %D 1974 %P 829-840 %V 26 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-078-4/ %R 10.4153/CJM-1974-078-4 %F 10_4153_CJM_1974_078_4