@article{ref1,
title="Volunteerism and the decline of violent crime",
journal="Journal of criminal law and criminology",
year="1998",
author="Friedman, W",
volume="88",
number="4",
pages="1453-1474",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0091-4169",
doi="",
url="http://dx.doi.org/"
}