@article{JMPA_1864_2_9__289_0,
     author = {Hermite},
     title = {Remarque sur le d\'eveloppement de $\cos \mathrm{am}x$},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {289--295},
     publisher = {Gauthier-Villars},
     volume = {2e s{\'e}rie, 9},
     year = {1864},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1864_2_9__289_0/}
}