@article{MSH_1981__76__5_0,
     author = {Descles, J. P.},
     title = {De la notion d'op\'eration \`a celle d'op\'erateur ou \`a la recherche de formalismes intrins\`eques},
     journal = {Math\'ematiques et sciences humaines},
     pages = {5--32},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {76},
     year = {1981},
     mrnumber = {674266},
     zbl = {0508.03007},
     language = {fr},
     url = {http://www.numdam.org/item/MSH_1981__76__5_0/}
}