@article{ref1,
title="A study of long term effects of football injury to the knee",
journal="Missouri medicine",
year="1964",
author="Rall, K. L. and Mcelroy, G. L. and Keats, T. E.",
volume="61",
number="",
pages="435-438",
abstract="<p>[Abstract unavailable]  Keywords: American football </p> <p>Language: en</p>",
language="en",
issn="0026-6620",
doi="",
url="http://dx.doi.org/"
}