@article{GDZPPN002056216, title = {\"Uber das Typenproblem Riemann'scher Fl\"achen.}, journal = {Commentarii mathematici Helvetici}, volume = {27}, year = {1953}, pages = {346-356}, zbl = {0051.31402}, url = {http://dml.mathdoc.fr/item/GDZPPN002056216} }
Pfluger, Albert. Über das Typenproblem Riemann'scher Flächen.. Commentarii mathematici Helvetici, Tome 27 (1953) pp. 346-356. http://gdmltest.u-ga.fr/item/GDZPPN002056216/