@article{Dur-Had-Jol-2006,
    author={Marc Duruflé and Houssem Haddar and Patrick Joly },
    title={High order generalized impedance boundary conditions in 
           electromagnetic scattering problems },
    journal={Comptes Rendus de l'Academie des Sciences de Paris Serie 
           Physique },
    year={2006 },
    month={6},
    volume={7 (5) },
    pages={533--542},
}