@conference{Bon-Leg-2010,
    author={Anne-Sophie Bonnet-BenDhia and Guillaume Legendre },
    title={A way to use Perfectly Matched Layers in the presence of 
           backward guided elastic waves },
    publisher={ECCOMAS Conference on Computational Mechanics - Solids, 
           Structures and Coupled Problems in Engineering (ECCM-2010) },
    year={2010 },
    month={5},
}