@article{JSFS_1921__62__21_0,
     author = {Pupin, Ren\'e},
     title = {Vari\'et\'e},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {21--23},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {62},
     year = {1921},
     language = {fr},
     url = {http://archive.numdam.org/item/JSFS_1921__62__21_0/}
}