@article{ref1,
title="Knee protection during Ranger school",
journal="Military medicine",
year="1992",
author="Caravalho, J. Jr",
volume="157",
number="9",
pages="A3-A3",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0026-4075",
doi="",
url="http://dx.doi.org/"
}