@article{ref1,
title="Annual cycles of aggression and plasma testosterone in captive male rhesus monkeys",
journal="Psychoneuroendocrinology",
year="1978",
author="Michael, R. P. and Zumpe, D.",
volume="3",
number="2",
pages="217-220",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0306-4530",
doi="",
url="http://dx.doi.org/"
}