@conference{Bon-Che-Cia-Cla-Naz-2013-1,
    author={Anne-Sophie Bonnet-BenDhia and Lucas Chesnel and Patrick 
           Ciarlet and Xavier Claeys and Sergei Nazarov },
    title={Negative materials and corners in electromagnetism },
    publisher={Conference on Computational Electromagnetism and Acoustics, 
           Oberwolfach, Allemagne },
    year={2013 },
}