@article{GDZPPN002063522,
title = {Abelian group extensions and the axiom of constructibility.},
journal = {Commentarii mathematici Helvetici},
volume = {54},
year = {1979},
pages = {440-457},
zbl = {0417.20049},
url = {http://dml.mathdoc.fr/item/GDZPPN002063522}
}
Huber, Martin; Eklof, Paul C. Abelian group extensions and the axiom of constructibility.. Commentarii mathematici Helvetici, Tome 54 (1979) pp. 440-457. http://gdmltest.u-ga.fr/item/GDZPPN002063522/