@article{ref1,
title="Knee and ankle injuries in football",
journal="Quarterly bulletin of Northwestern University Medical School",
year="1959",
author="Reid, S. E. and Helbing, E. J. Jr and Helion, T. E.",
volume="33",
number="",
pages="250-253",
abstract="<p>[Abstract unavailable]  Keywords: American football </p> <p>Language: en</p>",
language="en",
issn="0097-1103",
doi="",
url="http://dx.doi.org/"
}