@article{ref1,
title="Comment on "Spontaneous Alternation and Pattern of Reinforcement"",
journal="Quarterly journal of experimental psychology (1948)",
year="1968",
author="Lester, David",
volume="20",
number="1",
pages="86-91",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0033-555X",
doi="",
url="http://dx.doi.org/"
}