@INPROCEEDINGS {8650,
author={Z. A. Awan and P. M. Ramos},
doi={},
booktitle={IEEE International Instrumentation and Technology Conf. - I2MTC},
title={Improvement of Phase Difference Estimation Using Modified Ellipse Fit Method},
year={2010},
month={May},
volume={1},
pages={78-81} 
}