@article{MAN_1933__107_159578,
     author = {A. Marx},
     title = {Untersuchungen \"uber schlichte {Abbildungen}},
     journal = {Mathematische Annalen},
     pages = {40--67},
     publisher = {mathdoc},
     volume = {107},
     year = {1933},
     zbl = {58.0363.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1933__107_159578/}
}