@article{MZ_1957__67_169661,
     author = {J. Heinhold},
     title = {Zur konformen {Abbildung} schlichter {Gebiete.}},
     journal = {Mathematische Zeitschrift},
     pages = {133--138},
     publisher = {mathdoc},
     volume = {67},
     year = {1957},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1957__67_169661/}
}