@article{ref1,
title="Violence against nurses",
journal="Pennsylvania nurse",
year="1993",
author="Johnson, Gary E.",
volume="48",
number="5",
pages="24-24",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0031-4617",
doi="",
url="http://dx.doi.org/"
}