@article{ref1,
title="Frequency and nature of sports injuries",
journal="American journal of surgery",
year="1959",
author="Thorndike, A.",
volume="98",
number="",
pages="316-324",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9610",
doi="",
url="http://dx.doi.org/"
}