@article{ref1,
title="Traumatic subluxation of the hip resulting in aseptic necrosis and chondrolysis in a professional football player",
journal="American journal of sports medicine",
year="1991",
author="Cooper, D. E. and Warren, R. F. and Barnes, R.",
volume="19",
number="3",
pages="322-324",
abstract="<p>[Abstract unavailable]  Keywords: American football </p> <p>Language: en</p>",
language="en",
issn="0363-5465",
doi="",
url="http://dx.doi.org/"
}