@article{ref1,
title="Assessing aggression severity with the revised staff observation aggression scale",
journal="Journal of nervous and mental disease",
year="2002",
author="Nijman, Henk and Evers, Catharine and Merckelbach, Harald and Palmstierna, Tom",
volume="190",
number="3",
pages="198-200",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-3018",
doi="",
url="http://dx.doi.org/"
}