@article{MSH_1976__55__45_0,
     author = {Defays, D.},
     title = {Relations floues et analyse hi\'erarchique des questionnaires},
     journal = {Math\'ematiques et sciences humaines},
     pages = {45--60},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {55},
     year = {1976},
     mrnumber = {444294},
     language = {fr},
     url = {http://archive.numdam.org/item/MSH_1976__55__45_0/}
}