@article{ref1,
title="Intermittent reinforcement, guilt, and crime",
journal="Psychological reports",
year="1970",
author="Persons, R. W.",
volume="26",
number="2",
pages="421-422",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-2941",
doi="",
url="http://dx.doi.org/"
}