@article{ref1,
title="The cardiovascular fitness of airline pilots. Report of a Working Party of the Cardiology Committee of the Royal College of Physicians of London",
journal="British heart journal",
year="1978",
author="",
volume="40",
number="4",
pages="335-350",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-0769",
doi="",
url="http://dx.doi.org/"
}