@article{ref1,
title="KATA within the Kava circle: humor as a tool for aggression and conflict  in the Kingdom of Tonga, South Pacific",
journal="Aggressive behavior",
year="1991",
author="Olson, E.",
volume="17",
number="2",
pages="88-89",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}