@article{JMPA_1858_2_3__79_0,
     author = {Curtis, A.-H.},
     title = {Sur la surface lieu des centres de courbure principaux d'une surface courbe},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {79--83},
     publisher = {Gauthier-Villars},
     volume = {2e s{\'e}rie, 3},
     year = {1858},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1858_2_3__79_0/}
}