@ARTICLE {22655,
author={T.  Lopes and P. Almeida Almeida and J.  Cunha and A. Aguiar},
doi={10.1016/j.cmpb.2017.06.018},
journal={Computer Methods and Programs in Biomedicine},
title={Heart Rate Variability Metrics for Fine-grained Stress Level Assessment},
year={2017},
month={June},
volume={.},
number={148},
pages={71-80},
ISSN={0169-2607}
}