@article{ref1,
title="Loading capacity and increase of performance in old age",
journal="Schweizerische Zeitschrift fur Sportmedizin",
year="1973",
author="Steinmann, B.",
volume="21",
number="4",
pages="177-187",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0036-7885",
doi="",
url="http://dx.doi.org/"
}