Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1930__2_138546, author = {A. Speiser}, title = {Ueber {Riemannsche} {Fl\"achen.}}, journal = {Commentarii mathematici Helvetici}, pages = {284--293}, publisher = {mathdoc}, volume = {2}, year = {1930}, zbl = {56.0987.03}, url = {http://geodesic.mathdoc.fr/item/CMH_1930__2_138546/} }
A. Speiser. Ueber Riemannsche Flächen.. Commentarii mathematici Helvetici, Tome 2 (1930), pp. 284-293. http://geodesic.mathdoc.fr/item/CMH_1930__2_138546/