@article{ref1,
title="An updated index of safety performance",
journal="Professional safety, journal of the American Society of Safety Engineers",
year="1982",
author="Weaver, D. A.",
volume="27",
number="12",
pages="23-28",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0099-0027",
doi="",
url="http://dx.doi.org/"
}