@article{ref1,
title="Aggression: instinct or symptom?",
journal="Australian and New Zealand journal of psychiatry",
year="1971",
author="Freeman, D.",
volume="5",
number="2",
pages="66-77",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0004-8674",
doi="",
url="http://dx.doi.org/"
}