@article{ref1,
title="Gang warfare: what are the criteria for deriving assertions from facts in science?",
journal="Evolutionary anthropology: issues, news, and reviews",
year="2016",
author="Weiss, Kenneth M.",
volume="25",
number="6",
pages="271-275",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1060-1538",
doi="10.1002/evan.21509",
url="http://dx.doi.org/10.1002/evan.21509"
}