%0 Journal Article %A Selami Ercan %T Torsion-free groups with every proper homomorphic image an $\bf N_{1}$-group %J Algebra and discrete mathematics %D 2004 %P 56-58 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ADM_2004_2_a6/ %G en %F ADM_2004_2_a6