@article{GDZPPN002182149,
title = {o-projective ordered abelian groups.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {222},
year = {1966},
pages = {219-220},
zbl = {0158.03301},
url = {http://dml.mathdoc.fr/item/GDZPPN002182149}
}
Weinberg, E.C. o-projective ordered abelian groups.. Journal für die reine und angewandte Mathematik, Tome 222 (1966) pp. 219-220. http://gdmltest.u-ga.fr/item/GDZPPN002182149/