@article{ref1,
title="Sports and orthopedics",
journal="Fortschritte der Medizin",
year="1977",
author="Hipp, E.",
volume="95",
number="24",
pages="1561-2, 1592",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0015-8178",
doi="",
url="http://dx.doi.org/"
}