@article{BURO_1973__20__3_0, author = {Kreweras, G.}, title = {Sur les hi\'erarchies de segments}, journal = {Cahiers du Bureau universitaire de recherche op\'erationnelle S\'erie Recherche}, pages = {3--61}, publisher = {Institut Henri Poincar\'e - Institut de Statistique de l'Universit\'e de Paris}, volume = {20}, year = {1973}, language = {fr}, url = {http://archive.numdam.org/item/BURO_1973__20__3_0/} }