@article{CRMATH_2005__341_9_561_0,
     author = {Mario Dur\'an and Ignacio Muga and Jean-Claude N\'ed\'elec},
     title = {The {Helmholtz} equation with impedance in a half-space},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {561--566},
     publisher = {Elsevier},
     volume = {341},
     number = {9},
     year = {2005},
     doi = {10.1016/j.crma.2005.09.021},
     language = {en},
}