@article{MSH_1983__83__31_0,
     author = {Diday, Edwin},
     title = {Croisements, ordres et ultram\'etriques},
     journal = {Math\'ematiques et sciences humaines},
     pages = {31--54},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {83},
     year = {1983},
     mrnumber = {728544},
     zbl = {0528.62056},
     language = {fr},
     url = {http://www.numdam.org/item/MSH_1983__83__31_0/}
}