@article{JSFS_1885__26__177_0,
     author = {JSFS},
     title = {Vari\'et\'es},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {177--190},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {26},
     year = {1885},
     language = {fr},
     url = {http://www.numdam.org/item/JSFS_1885__26__177_0/}
}