@article{ref1,
title="Epidemiology and Prevention of Helicopter External Load Accidents",
journal="Journal of safety research",
year="1998",
author="Conway, George A. and Manwaring, J. C. and Garrett, L. C.",
volume="29",
number="2",
pages="107-121",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0022-4375",
doi="",
url="http://dx.doi.org/"
}