@article{ref1,
title="The Threat of Violence and Social-Change",
journal="American political science review",
year="1962",
author="Nieburg, H.L.",
volume="56",
number="4",
pages="865-873",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0003-0554",
doi="",
url="http://dx.doi.org/"
}