@article{ref1,
title="Instinct to teach: altruism or aggression",
journal="Aggressive behavior",
year="1977",
author="Barnett, SA",
volume="3",
number="3",
pages="209-229",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}