@article{JRAM_1930__163_149734,
     author = {Robert Schumacher},
     title = {Zwei- und {Dreipunktesysteme} auf {Kurven.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {125--133},
     publisher = {mathdoc},
     volume = {163},
     year = {1930},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1930__163_149734/}
}