@article{JMPA_1845_1_10__451_0,
     author = {Roberts, William},
     title = {Extrait d'une lettre de {M.} {William} {Roberts} \`a {M.} {Liouville}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {451--452},
     publisher = {Gauthier-Villars},
     volume = {1e s{\'e}rie, 10},
     year = {1845},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1845_1_10__451_0/}
}