@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/