@article{ref1,
title="The performance of adult alcoholics working for alcohol: a detailed operant analysis",
journal="British journal of addiction to alcohol and other drugs",
year="1976",
author="Sanders, R. M. and Nathan, P. E. and O'Brien, J. S.",
volume="71",
number="4",
pages="307-319",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-0890",
doi="",
url="http://dx.doi.org/"
}