@article{ref1,
title="Traumatic headache associated with the profession of boxing",
journal="Headache",
year="1962",
author="Elia, J. C.",
volume="2",
number="",
pages="138-146",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0017-8748",
doi="",
url="http://dx.doi.org/"
}