@article{ref1,
title="The gang problem in large and small cities: An analysis of police perceptions in nine states",
journal="Journal of gang research",
year="1995",
author="Quinn, James F. and Tobolowsky, Peggy M. and Downs, William T.",
volume="2",
number="2",
pages="13-23",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="1079-3062",
doi="",
url="http://dx.doi.org/"
}