@article{ref1,
title="A fresh look at system safety",
journal="Journal of Occupational Medicine",
year="1970",
author="Roland, H. E.",
volume="12",
number="3",
pages="70-76",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0096-1736",
doi="",
url="http://dx.doi.org/"
}