@article{JRAM_1843__26_147193,
     author = {F. Joachimsthal},
     title = {Ueber die {Normalen} der {Ellipse} und des {Ellipsoids.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {172--180},
     year = {1843},
     volume = {26},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1843__26_147193/}
}