@article{ref1,
title="Systems Safety and Health",
journal="Aerospace medicine",
year="1961",
author="Hanks, T. G.",
volume="32",
number="4",
pages="283-283",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}