@article{ref1,
title="Violence: clarified",
journal="Science",
year="2012",
author="Pinker, Steven",
volume="338",
number="6105",
pages="327-328",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0036-8075",
doi="10.1126/science.338.6105.327-b",
url="http://dx.doi.org/10.1126/science.338.6105.327-b"
}