@article{JMPA_1867_2_12__87_0,
     author = {Gilbert, Ph.},
     title = {Sur les fonctions de {Sturm}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {87--97},
     publisher = {Gauthier-Villars},
     volume = {2e s{\'e}rie, 12},
     year = {1867},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1867_2_12__87_0/}
}