@article{ref1,
title="Classroom behavior and underachievement",
journal="American educational research journal",
year="1965",
author="Perkins, Hugh V.",
volume="2",
number="1",
pages="1-12",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0002-8312",
doi="10.3102/00028312002001001",
url="http://dx.doi.org/10.3102/00028312002001001"
}