@article{ref1,
title="A playroom observational procedure for assessing hyperactive boys",
journal="Journal of pediatric psychology",
year="1984",
author="Roberts, M. A. and Ray, R. S. and Roberts, Ralph J. Jr",
volume="9",
number="2",
pages="177-191",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0146-8693",
doi="",
url="http://dx.doi.org/"
}