@article{MSH_1978__62__61_0,
     author = {Chandon, J. L. and Lemaire, J. and Pouget, J.},
     title = {D\'enombrement des quasi-ordres sur un ensemble fini},
     journal = {Math\'ematiques et sciences humaines},
     pages = {61--80},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {62},
     year = {1978},
     mrnumber = {517680},
     zbl = {0446.06001},
     language = {fr},
     url = {http://www.numdam.org/item/MSH_1978__62__61_0/}
}