TY - JOUR AU - R.B., Jr. Warfield TI - Homomorphisms and Duality for Torsion-free Groups. JO - Mathematische Zeitschrift PY - 1968 SP - 189 EP - 200 VL - 107 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZ_1968__107_171063/ ID - MZ_1968__107_171063 ER -