@INPROCEEDINGS {3975,
author={R. Queirós and V. Matz and P.M. Girão and A. Serra},
doi={},
booktitle={Conf. on Telecommunications  - ConfTele},
title={Ultrasonic Thickness Estimation using Cross-Correlation and Phase-Shift},
year={2007},
month={May},
volume={},
pages={---} 
}