@article{RSA_1956__4_2_9_0,
     author = {Gibrat, M.},
     title = {Allocution de {M.} {Gibrat}},
     journal = {Revue de Statistique Appliqu\'ee},
     pages = {9--12},
     publisher = {Soci\'et\'e de Statistique de France},
     volume = {4},
     number = {2},
     year = {1956},
     language = {fr},
     url = {http://www.numdam.org/item/RSA_1956__4_2_9_0/}
}