@INPROCEEDINGS {11372,
author={A. Topa and C. R. Paiva and A. Barbosa},
doi={},
booktitle={Encuentro Ibérico de Electromagnetismo Computacional - EIEC},
title={Recent Investigation on Indefinite Medium Waveguides},
year={2011},
month={November},
volume={1},
pages={1-1} 
}