@article{JMPA_1865_2_10__234_0,
     author = {Liouville, J.},
     title = {Extrait d'une lettre de {M.} {Liouville} \`a {M.} {Besge}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {234--234},
     publisher = {Gauthier-Villars},
     volume = {2e s{\'e}rie, 10},
     year = {1865},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1865_2_10__234_0/}
}