@article{RSA_1990__38_3_53_0,
     author = {Bertrand, P. and Diday, E.},
     title = {Une g\'en\'eralisation des arbres hi\'erarchiques : les repr\'esentations pyramidales},
     journal = {Revue de Statistique Appliqu\'ee},
     pages = {53--78},
     publisher = {Soci\'et\'e de Statistique de France},
     volume = {38},
     number = {3},
     year = {1990},
     language = {fr},
     url = {http://archive.numdam.org/item/RSA_1990__38_3_53_0/}
}