@article{ref1,
title="Variable-oriented and person-oriented approaches to longitudinal research on aggression as an early risk factor of adult social behavior",
journal="Aggressive behavior",
year="1991",
author="Pulkkinen, Lea",
volume="17",
number="2",
pages="92-93",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}