@article{ref1,
title="Cocaine abusers in therapeutic community treatment",
journal="NIDA research monograph",
year="1993",
author="De Leon, G.",
volume="135",
number="",
pages="163-189",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}