@article{ref1,
title="Sources of control over schedule-induced drinking produced by second-order schedules of reinforcement",
journal="Physiology and behavior",
year="1977",
author="Allen, J. D. and Porter, J. H.",
volume="18",
number="5",
pages="853-863",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-9384",
doi="",
url="http://dx.doi.org/"
}