@article{ref1,
title="An experimental analysis of behavioral factors in drug dependence",
journal="Federation proceedings",
year="1975",
author="Thompson, T. and Pickens, R.",
volume="34",
number="9",
pages="1759-1770",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0014-9446",
doi="",
url="http://dx.doi.org/"
}