@article{ref1,
title="An existential theory of drug dependence",
journal="NIDA research monograph",
year="1980",
author="Greaves, G. B.",
volume="30",
number="",
pages="24-28",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}