@article{JMPA_1883_3_9__257_0,
     author = {Collet},
     title = {Des enveloppes des courbes dans l'espace},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {257--268},
     publisher = {Gauthier-Villars},
     volume = {3e s{\'e}rie, 9},
     year = {1883},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1883_3_9__257_0/}
}