@article{ref1,
title="Acute sporting injuries to the knee joint (author's transl)",
journal="Unfallheilkunde",
year="1979",
author="Hipp, E. and Karpf, P. M. and Mang, W.",
volume="82",
number="4",
pages="143-154",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0341-5694",
doi="",
url="http://dx.doi.org/"
}