@article{ref1,
title="Knee impact injuries in motorcycle drivers and passengers",
journal="Helvetica Chirurgica Acta",
year="1987",
author="Kurock, W. and Sennerich, T.",
volume="54",
number="4",
pages="451-455",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0018-0181",
doi="",
url="http://dx.doi.org/"
}