@article{ref1,
title="Androgens, aggressiveness, and stress in the human male",
journal="Aggressive behavior",
year="1989",
author="Christiansen, Katie and Knussman, R",
volume="15",
number="1",
pages="49-49",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}