@article{ref1,
title="Reinforcing value of several types of aggressive behavior: a review",
journal="Aggressive behavior",
year="1979",
author="Potegal, Michael",
volume="5",
number="4",
pages="353-373",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}