@article{MAN_1937__114_159935,
     author = {K. Wagner},
     title = {\"Uber eine {Eigenschaft} der ebenen {Komplexe}},
     journal = {Mathematische Annalen},
     pages = {570--590},
     publisher = {mathdoc},
     volume = {114},
     year = {1937},
     zbl = {63.0550.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1937__114_159935/}
}