@inbook{Fli-Jol-Li-2009,
    author={Sonia Fliss and Patrick Joly and Jing-Rebecca Li },
    title={Exact boundary conditions for wave propagation in periodic 
           media containing a local perturbation },
    publisher={E-Book Series Progress in Computational Physics (PiCP), Volume 
           1 },
    year={2009 },
    month={12},
    series={Bentham Science Publishers },
}