@article{MZ_1942__47_168948,
     author = {Gericke. H.},
     title = {Zur {Relativ-Geometrie} ebener {Kurven}},
     journal = {Mathematische Zeitschrift},
     pages = {215--228},
     year = {1942},
     volume = {47},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1942__47_168948/}
}