@article{ref1,
title="The importance of cohesion for gang research, policy, and practice",
journal="Criminology and public policy",
year="2013",
author="Papachristos, Andrew V.",
volume="12",
number="1",
pages="49-58",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1538-6473",
doi="10.1111/1745-9133.12006",
url="http://dx.doi.org/10.1111/1745-9133.12006"
}