@article{ref1,
title="EMS helicopter safety revisited",
journal="Hospital aviation",
year="1989",
author="Dodd, R. S.",
volume="8",
number="1",
pages="6-8",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0740-8315",
doi="",
url="http://dx.doi.org/"
}