@article{MSH_1967__19__21_0,
     author = {Ostrowski, Jan},
     title = {R\'eponse \`a un appel},
     journal = {Math\'ematiques et sciences humaines},
     pages = {21--26},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {19},
     year = {1967},
     language = {fr},
     url = {http://www.numdam.org/item/MSH_1967__19__21_0/}
}