@article{ref1,
title="Football helmet design and concussion",
journal="Journal of neurosurgery",
year="2014",
author="Comrie, Don and Morey, Sean J.",
volume="121",
number="2",
pages="491-494",
abstract="<p>[Abstract unavailable]  KW: American football</p> <p>Language: en</p>",
language="en",
issn="0022-3085",
doi="10.3171/2014.2.JNS14294",
url="http://dx.doi.org/10.3171/2014.2.JNS14294"
}