@article{ref1,
title="The physiology of extreme physical exertion",
journal="Endeavour",
year="1987",
author="Kuipers, H.",
volume="11",
number="2",
pages="63-66",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0160-9327",
doi="",
url="http://dx.doi.org/"
}