@article{Bec-Kac-2017,
    author={Éliane Bécache and Maryna Kachanovska },
    title={Stable perfectly matched layers for a class of anisotropic 
           dispersive models. Part I: Necessary and sufficient conditions 
           of stability },
    doi={10.1051/m2an/2017019 },
    journal={ESAIM: Mathematical Modelling and Numerical Analysis (M2AN) },
    year={2017 },
    month={12},
    volume={51, number 6 },
    pages={2399--2434},
}