@article{GDZPPN002403390,
title = {Homomorphisms and Duality for Torsion-free Groups.},
journal = {Mathematische Zeitschrift},
volume = {105},
year = {1968},
pages = {189-200},
zbl = {0169.03602},
url = {http://dml.mathdoc.fr/item/GDZPPN002403390}
}
Warfield, R.B., Jr. Homomorphisms and Duality for Torsion-free Groups.. Mathematische Zeitschrift, Tome 105 (1968) pp. 189-200. http://gdmltest.u-ga.fr/item/GDZPPN002403390/