@article{ref1,
title="On the difference between internal and external reactions to legitimate and illegitimate frustrations: a demonstration",
journal="Aggressive behavior",
year="1981",
author="Berkowitz, Leonard",
volume="7",
number="2",
pages="83-96",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}