@article{ref1,
title="Helmets and helicopter safety",
journal="Journal of Occupational Medicine",
year="1992",
author="Wakeman, M. A. and Hall, K. N.",
volume="34",
number="3",
pages="255-255",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0096-1736",
doi="",
url="http://dx.doi.org/"
}