@article{CMH_1964__39_139283,
     author = {R. Cairoli},
     title = {Sur le prolongement naturel de fonctions sigma-additives.},
     journal = {Commentarii mathematici Helvetici},
     pages = {90--96},
     publisher = {mathdoc},
     volume = {39},
     year = {1964},
     zbl = {0129.03603},
     url = {http://geodesic.mathdoc.fr/item/CMH_1964__39_139283/}
}