@article{GDZPPN002094088,
title = {The Degree and Branch Set of a Branched Covering.},
journal = {Inventiones mathematicae},
volume = {46},
year = {1978},
pages = {213-220},
zbl = {0359.55003},
url = {http://dml.mathdoc.fr/item/GDZPPN002094088}
}
Edmonds, Allan L.; Berstein, Israel. The Degree and Branch Set of a Branched Covering.. Inventiones mathematicae, Tome 46 (1978) pp. 213-220. http://gdmltest.u-ga.fr/item/GDZPPN002094088/