@INPROCEEDINGS {13265,
author={O. Postolache and P.M. Girão and G. Postolache},
doi={0},
booktitle={International Conf. of the IEEE Engineering in Medicine and Biology Society - EMBC},
title={Comparative analysis of two systems for unobtrusive heart signal},
year={2013},
month={July},
volume={I},
pages={1-4} 
}