@article{ref1,
title="Human d-amphetamine drug discrimination: testing with d-amphetamine and hydromorphone",
journal="NIDA research monograph",
year="1989",
author="Lamb, R. J. and Henningfield, J. E.",
volume="95",
number="",
pages="423-424",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}