@article{ref1,
title="Towards a unified theory of human aggression",
journal="British journal of medical psychology",
year="1971",
author="Zegans, L. S.",
volume="44",
number="4",
pages="355-365",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-1129",
doi="",
url="http://dx.doi.org/"
}