@INPROCEEDINGS {2009,
author={J. M. Dias Pereira and O. Postolache and P.M. Girão and H.  Ramos},
doi={},
booktitle={IMEKO TC4 Symp.},
title={Smart Oil and Conductivity Sensor for Water Quality Monitoring},
year={2004},
month={September},
volume={2},
pages={417-422} 
}