@article{JDM_1926__34_145726,
     author = {Edmund Landau},
     title = {Einige {Bemerkungen} \"uber schlichte {Abbildung.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {239--243},
     publisher = {mathdoc},
     volume = {34},
     year = {1926},
     zbl = {52.0349.03},
     url = {http://geodesic.mathdoc.fr/item/JDM_1926__34_145726/}
}