@article{GDZPPN002330504, title = {Branch Points of Conformal Mappings of Surfaces.}, journal = {Mathematische Annalen}, volume = {277}, year = {1987}, pages = {621-634}, zbl = {0653.53046}, url = {http://dml.mathdoc.fr/item/GDZPPN002330504} }
Eschenburg, J.; Tribuzy, R. Branch Points of Conformal Mappings of Surfaces.. Mathematische Annalen, Tome 277 (1987) pp. 621-634. http://gdmltest.u-ga.fr/item/GDZPPN002330504/