@article{ref1,
title="Subjective factors related to fatigue",
journal="Alcohol, drugs and driving",
year="1989",
author="Nelson, Thomas M.",
volume="5",
number="3",
pages="193-214",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0891-7086",
doi="",
url="http://dx.doi.org/"
}