@article{CMH_1946__19_138903,
     author = {C. Carath\'eodory},
     title = {Zum {Schwarzschen} {Spiegelungsprinzip.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {263--278},
     publisher = {mathdoc},
     volume = {19},
     year = {1946},
     url = {http://geodesic.mathdoc.fr/item/CMH_1946__19_138903/}
}