@article{MZ_1918__2_167479,
     author = {0., Scheffers},
     title = {Fl\"achentreue {Abbildungen} in der {Ebene}},
     journal = {Mathematische Zeitschrift},
     pages = {180--186},
     publisher = {mathdoc},
     volume = {2},
     year = {1918},
     zbl = {46.1032.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1918__2_167479/}
}