@article{ref1,
title="The Lessons of Columbine, Part II",
journal="American behavioral scientist",
year="2009",
author="Muschert, G. W. and Spencer, J. W.",
volume="52",
number="10",
pages="1351-1353",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0002-7642",
doi="10.1177/0002764209332551",
url="http://dx.doi.org/10.1177/0002764209332551"
}