@article{ref1,
title="Vigilance, boredom, and sleepiness",
journal="Journal of clinical monitoring and computing",
year="1999",
author="Weinger, Matthew B.",
volume="15",
number="7-8",
pages="549-552",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1387-1307",
doi="",
url="http://dx.doi.org/"
}