@article{JRAM_1859__56_147755,
     author = {A. Cayley},
     title = {Note sur les normales d'une conique.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {182--185},
     publisher = {mathdoc},
     volume = {56},
     year = {1859},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1859__56_147755/}
}