@article{Gra-Cha-Bon-Sem-2012,
    author={Eva Grasso and Stéphanie Chaillat and Marc Bonnet and 
           Jean-François Semblat },
    title={Application of the multi-level time-harmonic fast multipole 
           BEM to 3-D visco-elastodynamics },
    doi={10.1016/j.enganabound.2011.11.015 },
    journal={Engineering Analysis with Boundary Elements },
    year={2012 },
    volume={36 },
    pages={744--758},
}