@article{M2AN_1997__31_6_679_0,
     author = {Despr\'es, Bruno},
     title = {Fonctionnelle quadratique et \'equations int\'egrales pour les probl\`emes d'onde harmonique en domaine ext\'erieur},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {679--732},
     publisher = {Elsevier},
     volume = {31},
     number = {6},
     year = {1997},
     mrnumber = {1485752},
     zbl = {0890.65131},
     language = {fr},
     url = {http://www.numdam.org/item/M2AN_1997__31_6_679_0/}
}