@INPROCEEDINGS {1753,
author={H.  Ramos and P.M. Girão},
doi={},
booktitle={IEEE Mediterranean Electrotechnical Conference - MELECON},
title={Low Cost Audio Analog Vector Voltmeter/Wattmeter},
year={1994},
month={April},
volume={3},
pages={1201-1203} 
}