@article{ref1,
title="Knee injuries on the field of sport",
journal="Rheumatism",
year="1964",
author="Williams, J. G.",
volume="20",
number="",
pages="76-87",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0370-5250",
doi="",
url="http://dx.doi.org/"
}