@article{ref1,
title="Cyclicity of aggression and self-injurious behavior in individuals with mental retardation",
journal="American journal on mental retardation",
year="1995",
author="Lewis, M. H. and Silva, J. R. and Silva, S.",
volume="99",
number="4",
pages="436-444",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0895-8017",
doi="",
url="http://dx.doi.org/"
}