@article{ref1,
title="Exposure of drivers to carbon monoxide",
journal="Journal of the Air Pollution Control Association",
year="1980",
author="Colwill, D. M. and Hickman, A. J.",
volume="30",
number="12",
pages="1316-1319",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-2470",
doi="",
url="http://dx.doi.org/"
}