@article{ref1,
title="Where earth meets sky. Safe operations at helicopter scenes",
journal="JEMS: a journal of emergency medical services",
year="1992",
author="Edgington, B.",
volume="17",
number="10",
pages="36-40",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0197-2510",
doi="",
url="http://dx.doi.org/"
}