@article{Ass-Cia-Rav-Son-1999,
    author={Franck Assous and Patrick Ciarlet and Pierre-Arnaud Raviart 
           and Eric Sonnendrücker },
    title={A characterization of the singular part of the solution to 
           Maxwell's equations in a polyhedral domain },
    doi={10.1002/(SICI)1099-1476(199904)22:6<485::AID-MMA46>3.0.CO;2-E },
    journal={Mathematical Methods in the Applied Sciences },
    year={1999 },
    volume={22 },
    pages={485--499},
}