@article{urn:eudml:doc:42172,
title = {When is a group homomorphism a covering homomorphism? },
journal = {Extracta Mathematicae},
volume = {22},
year = {2007},
pages = {325-330},
zbl = {1146.54017},
language = {en},
url = {http://dml.mathdoc.fr/item/urn:eudml:doc:42172}
}
Santos, J. C. When is a group homomorphism a covering homomorphism? . Extracta Mathematicae, Tome 22 (2007) pp. 325-330. http://gdmltest.u-ga.fr/item/urn:eudml:doc:42172/