@article{ref1,
title="Analysis of physical abuse in American-schools",
journal="Aggressive behavior",
year="1987",
author="Hyman, Irwin A. and Clarke, J. and Erdlen, RJ",
volume="13",
number="1",
pages="1-7",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}