@article{ref1,
title="Vi. Early child behavior problem factors",
journal="Monographs of the society for research in child development",
year="2009",
author="",
volume="74",
number="3",
pages="61-65",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0037-976X",
doi="10.1111/j.1540-5834.2009.00534.x",
url="http://dx.doi.org/10.1111/j.1540-5834.2009.00534.x"
}