@article{ref1,
title="Beyond the evil empire: horseplay and aggression",
journal="Aggressive behavior",
year="1990",
author="Gergen, M.",
volume="16",
number="6",
pages="381-398",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}