@article{MZ_1939__45_168874,
     author = {H., Wittich},
     title = {\"Uber die konforme {Abbildung} einer {Klasse} {Riemannscher} {Fl\"achen}},
     journal = {Mathematische Zeitschrift},
     pages = {642--668},
     publisher = {mathdoc},
     volume = {45},
     year = {1939},
     zbl = {0021.41902},
     url = {http://geodesic.mathdoc.fr/item/MZ_1939__45_168874/}
}