@INPROCEEDINGS {92,
author={A. Topa and C. R. Paiva and A. Barbosa},
doi={},
booktitle={Asia Pacific Microwave Conf. - APMC},
title={Design of Pseudochiral  Omega-NRD Directional Couplers},
year={2000},
month={December},
volume={1},
pages={1238-1241} 
}