@article{ref1,
title="Reduction of stereotypies by reinforcement of toy play",
journal="Mental retardation",
year="1973",
author="Flavell, J. E.",
volume="11",
number="4",
pages="21-23",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0047-6765",
doi="",
url="http://dx.doi.org/"
}