@article{JMPA_1840_1_5__72_0,
     author = {Lejeune-Dirichlet},
     title = {Extrait d'une lettre de {M.} {Lejeune-Dirichlet} \`a {M.} {Liouville}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {72--74},
     publisher = {Gauthier-Villars},
     volume = {1e s{\'e}rie, 5},
     year = {1840},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1840_1_5__72_0/}
}