@article{JMPA_1880_3_6__19_0,
     author = {de Saint-Germain, A.},
     title = {Sur le parall\'elogramme de {Watt}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {19--26},
     publisher = {Gauthier-Villars},
     volume = {3e s{\'e}rie, 6},
     year = {1880},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1880_3_6__19_0/}
}