@article{ref1,
title="Selective reinforcement of response speeds in children",
journal="Journal of experimental psychology",
year="1968",
author="Cairns, R. B. and Proctor, S.",
volume="77",
number="1",
pages="168-170",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-1015",
doi="",
url="http://dx.doi.org/"
}