@article{ref1,
title="Problems in human aggression research",
journal="Journal of neuropsychiatry and clinical neurosciences",
year="1991",
author="de Koning, Paul and Mak, Marianne",
volume="3",
number="2",
pages="S61-S65",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0895-0172",
doi="",
url="http://dx.doi.org/"
}