@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/