@article{1077310581, author = {Beale, J. Thomas}, title = {Purely imaginary scattering frequencies for exterior domains}, journal = {Duke Math. J.}, volume = {41}, number = {1}, year = {1974}, pages = { 607-637}, language = {en}, url = {http://dml.mathdoc.fr/item/1077310581} }
Beale, J. Thomas. Purely imaginary scattering frequencies for exterior domains. Duke Math. J., Tome 41 (1974) no. 1, pp. 607-637. http://gdmltest.u-ga.fr/item/1077310581/