@article{ref1,
title="NFPA update: leakage current limits changed",
journal="Health devices",
year="1990",
author="",
volume="19",
number="1",
pages="22-22",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0046-7022",
doi="",
url="http://dx.doi.org/"
}