@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: Mathematical Modelling and Numerical Analysis }, pages = {679--732}, publisher = {Elsevier}, volume = {31}, number = {6}, year = {1997}, mrnumber = {1485752}, zbl = {0890.65131}, language = {fr}, url = {http://geodesic.mathdoc.fr/item/M2AN_1997__31_6_679_0/} }