@article{ref1,
title="Early diagnosis of cardiovascular disease among air-crew",
journal="Aerospace medicine",
year="1966",
author="Kirchhoff, H. W. and Lauschner, E. A.",
volume="37",
number="5",
pages="509-514",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}