@article{MSH_1971__34__43_0,
     author = {Roubaud, Jacques},
     title = {La notion d'associativit\'e relative},
     journal = {Math\'ematiques et sciences humaines},
     pages = {43--59},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {34},
     year = {1971},
     mrnumber = {297681},
     zbl = {0327.08009},
     language = {fr},
     url = {http://www.numdam.org/item/MSH_1971__34__43_0/}
}