@article{MAN_1879__15_156846,
     author = {Halphen},
     title = {Sur la {Th\'eorie} des {Caract\'eristiques} pour les {Coniques}},
     journal = {Mathematische Annalen},
     pages = {16--38},
     publisher = {mathdoc},
     volume = {15},
     year = {1879},
     zbl = {11.0463.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1879__15_156846/}
}