@article{ref1,
title="Injuries to knee ligaments. Relationship to looseness and tightness in football players",
journal="JAMA journal of the American Medical Association",
year="1970",
author="Nicholas, J. A.",
volume="212",
number="13",
pages="2236-2239",
abstract="<p>[Abstract unavailable]  Keywords: American football </p> <p>Language: en</p>",
language="en",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}