@article{ref1,
title="Protest symbology: political content and demonstration outcomes",
journal="Aggressive behavior",
year="1986",
author="Kowalewski, David",
volume="12",
number="3",
pages="183-195",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}