@article{ref1,
title="Human aggression and the extra Y chromosome. Fact or fantasy?",
journal="American journal of psychology",
year="1973",
author="Jarvik, L. F. and Klodin, V. and Matsuyama, S. S.",
volume="28",
number="8",
pages="674-682",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9556",
doi="",
url="http://dx.doi.org/"
}