@article{JMPA_1850_1_15__194_0,
     author = {Roberts, William},
     title = {Th\'eor\`eme sur les arcs des lignes aplan\'etiques},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {194--196},
     publisher = {Gauthier-Villars},
     volume = {1e s{\'e}rie, 15},
     year = {1850},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1850_1_15__194_0/}
}