@article{ref1,
title="Aggression in nature and society",
journal="British journal of medical psychology",
year="1949",
author="Hanson, D. A.",
volume="22",
number="3-4",
pages="151-155",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0007-1129",
doi="",
url="http://dx.doi.org/"
}