@article{ref1,
title="Leather football helmets. Author reply",
journal="Journal of neurosurgery",
year="2013",
author="Rowson, Steven and Daniel, Ray W. and Duma, Stefan M.",
volume="119",
number="3",
pages="804-804",
abstract="<p>[Abstract unavailable]  Keywords: American football; </p> <p>Language: en</p>",
language="en",
issn="0022-3085",
doi="",
url="http://dx.doi.org/"
}