@INPROCEEDINGS {51,
author={M. G. Silveirinha and C. A. Fernandes},
doi={},
booktitle={Encuentro Ibérico de Electromagnetismo Computacional - EIEC},
title={Design Tolerances of Artificial Material Shaped-beam Lenses},
year={2001},
month={December},
volume={},
pages={-} 
}