@article{ref1,
title="Columbine, Erfurt, Jokela: lessons learned from school massacres",
journal="Lakartidningen",
year="2007",
author="Gustafsson, Lars H.",
volume="104",
number="48",
pages="3697-3698",
abstract="<p>[Abstract unavailable]</p> <p>Language: sv</p>",
language="sv",
issn="0023-7205",
doi="",
url="http://dx.doi.org/"
}