@ARTICLE {21417,
author={T.  Lopes and P. Almeida Almeida and J. P. C. Silva Cunha and A. Aguiar},
doi={10.1088/2057-1976/3/1/017004},
journal={Biomedical Physics and Engineering Express},
title={Validation of a low intrusiveness heart rate sensor for stress assessment},
year={2017},
month={January},
volume={3},
number={1},
pages={1-8},
ISSN={2057-1976}
}