@article{ref1,
title="Violence-prone families",
journal="Annals of the New York Academy of Sciences",
year="1980",
author="Steinmetz, S. K.",
volume="347",
number="",
pages="251-265",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0077-8923",
doi="",
url="http://dx.doi.org/"
}