@article{ref1,
title="Factors related to aggressive and violent behavior among preadolescent African-American boys",
journal="International journal of adolescence and youth",
year="2001",
author="Shields, Nancy and Pierce, Lois",
volume="10",
number="1-2",
pages="51-68",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0267-3843",
doi="",
url="http://dx.doi.org/"
}