@article{ref1,
title="Factors controlling predatory aggression in animals",
journal="Aggressive behavior",
year="1989",
author="Nikulina, E. M.",
volume="15",
number="1",
pages="93-93",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}