@article{ref1,
title="Drugs and violence: causes, correlates, and consequences",
journal="NIDA research monograph",
year="1990",
author="",
volume="103",
number="",
pages="1-275",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}