@article{ref1,
title="Improving commercial driver safety",
journal="American Association for Automotive Medicine quarterly jurnal",
year="1987",
author="Johns, WE",
volume="9",
number="2",
pages="8-9",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0197-7725",
doi="",
url="http://dx.doi.org/"
}