@article{ref1,
title="Hazards in helicopter flying",
journal="Statistical Bulletin (Met. Life)",
year="1980",
author="",
volume="61",
number="1",
pages="5-7",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0026-1513",
doi="",
url="http://dx.doi.org/"
}