@article{JSFS_1926__67__426_0,
     author = {Ichok, G.},
     title = {Revue de statistique sanitaire},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {426--432},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {67},
     year = {1926},
     language = {fr},
     url = {http://archive.numdam.org/item/JSFS_1926__67__426_0/}
}