@article{ref1,
title="Keep safe from tail rotor strikes",
journal="Journal of air medical transport",
year="1990",
author="Dolan, J.",
volume="9",
number="2",
pages="9-11",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1046-9095",
doi="",
url="http://dx.doi.org/"
}