@article{JMPA_1848_1_13__179_0, author = {Roberts, William}, title = {D\'emonstration de deux th\'eor\`emes g\'en\'eraux sur les p\'erim\`etres de quelques courbes d\'eriv\'ees des hyperboles conjugu\'ees}, journal = {Journal de Math\'ematiques Pures et Appliqu\'ees}, pages = {179--184}, publisher = {Gauthier-Villars}, volume = {1e s{\'e}rie, 13}, year = {1848}, language = {fr}, url = {http://archive.numdam.org/item/JMPA_1848_1_13__179_0/} }