@article{ref1,
title="From safety zone to war zone: hospital violence",
journal="California hospitals",
year="1993",
author="Evans, P. and Stein, T.",
volume="7",
number="6",
pages="18-9, 23",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0896-2766",
doi="",
url="http://dx.doi.org/"
}