@article{MSH_1964__5__27_0, author = {Chenon, R.}, title = {Bi-ordres}, journal = {Math\'ematiques et sciences humaines}, pages = {27--32}, publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique}, volume = {5}, year = {1964}, language = {fr}, url = {http://archive.numdam.org/item/MSH_1964__5__27_0/} }