@article{ref1,
title="Guns in the world: old news and new news",
journal="Injury prevention",
year="2002",
author="Christoffel, Katherine Kaufer",
volume="8",
number="3",
pages="177-180",
abstract="Abstract unavailable.",
language="en",
issn="1353-8047",
doi="",
url="http://dx.doi.org/"
}