@article{ref1,
title="Youth violence and exposure to violence in childhood: an ecological review",
journal="Aggression and violent behavior",
year="1998",
author="Jonson-Reid, Melissa",
volume="3",
number="2",
pages="159-179",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="1359-1789",
doi="",
url="http://dx.doi.org/"
}