@article{ref1,
title="The five horsemen of the Apocalypse",
journal="Hospital aviation",
year="1989",
author="Stroetmann, C. H.",
volume="8",
number="1",
pages="30-30",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0740-8315",
doi="",
url="http://dx.doi.org/"
}