@article{ref1,
title="Violence",
journal="Headache",
year="1976",
author="Brott, T. and Leviton, A.",
volume="16",
number="5",
pages="203-209",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0017-8748",
doi="",
url="http://dx.doi.org/"
}