@article{JSFS_1888__29__226_0,
     author = {JSFS},
     title = {Vari\'et\'es},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {226--232},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {29},
     year = {1888},
     language = {fr},
     url = {http://www.numdam.org/item/JSFS_1888__29__226_0/}
}