@article{GDZPPN002062941, title = {On quasiconformal mappings of open Riemann surfaces.}, journal = {Commentarii mathematici Helvetici}, volume = {53}, year = {1978}, pages = {301-321}, zbl = {0421.30017}, url = {http://dml.mathdoc.fr/item/GDZPPN002062941} }
Strebel, Kurt. On quasiconformal mappings of open Riemann surfaces.. Commentarii mathematici Helvetici, Tome 53 (1978) pp. 301-321. http://gdmltest.u-ga.fr/item/GDZPPN002062941/