@article{ref1,
title="Medial amygdala and aggressive behavior:  interaction between testosterone and vasopressin",
journal="Aggressive behavior",
year="1990",
author="Koolhaas, Jaap M. and Vandenbrink, THC and Roozendaal, B and Boorsma, F",
volume="16",
number="3-4",
pages="223-229",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}