@article{ref1,
title="Twisting the knee joint as a principal cause of accident",
journal="Monatsschrift fur Unfallheilkunde, Versicherungs-, Versorgungs- und Verkehrsmedizin",
year="1964",
author="Falk, Erika",
volume="67",
number="",
pages="409-414",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0026-9336",
doi="",
url="http://dx.doi.org/"
}