@article{JRAM_1831__7_146722,
     author = {Th. Clausen},
     title = {Beweis einiger geometrischen {S\"atze.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {36--40},
     year = {1831},
     volume = {7},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1831__7_146722/}
}