@INPROCEEDINGS {2268,
author={P. Monteiro and M. Violas and R.   Ribeiro and R. F. Rocha},
doi={},
booktitle={International Workshop on Microwave Filters},
title={Active Distributed Transversal Filters for Multigigabit Optical Communication Systems},
year={2002},
month={June},
volume={-},
pages={---} 
}