@article{JMPA_1844_1_9__133_0,
     author = {Bertrand, J.},
     title = {M\'emoire sur la th\'eorie des surfaces},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {133--154},
     publisher = {Gauthier-Villars},
     volume = {1e s{\'e}rie, 9},
     year = {1844},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1844_1_9__133_0/}
}