@article{ref1,
title="Cabin air quality in aircraft",
journal="British medical journal: BMJ",
year="1994",
author="Harding, R.",
volume="308",
number="6926",
pages="427-428",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}