@article{ref1,
title="Effect of drowsiness on driving performance variables of commercial vehicle drivers",
journal="International journal of automotive technology",
year="2010",
author="Mortazavi, A. and Eskandarian, A. and Sayed, R. A.",
volume="10",
number="3",
pages="391-404",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1229-9138",
doi="10.1007/s12239-009-0045-x",
url="http://dx.doi.org/10.1007/s12239-009-0045-x"
}