@article{ref1,
title="The concept of physical capacity",
journal="Zeitschrift fur Arztliche Fortbildung (Jena)",
year="1976",
author="Israel, S.",
volume="70",
number="7",
pages="334-340",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-2178",
doi="",
url="http://dx.doi.org/"
}