@article{GDZPPN002333686,
title = {Hyperbolicity and branched coverings.},
journal = {Mathematische Annalen},
volume = {287},
year = {1990},
pages = {537-548},
zbl = {0847.32029},
url = {http://dml.mathdoc.fr/item/GDZPPN002333686}
}
Schumacher, Georg; Takegoshi, Kensho. Hyperbolicity and branched coverings.. Mathematische Annalen, Tome 287 (1990) pp. 537-548. http://gdmltest.u-ga.fr/item/GDZPPN002333686/