@article{ref1,
title="Spectral analysis of heart rate variability as an indicator of driver fatigue",
journal="Ergonomics",
year="1982",
author="Egelund, N.",
volume="25",
number="7",
pages="663-672",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}