@article{ref1,
title="Ergonomics: where have we been and where are we going: II",
journal="Ergonomics",
year="1976",
author="Christensen, J. M.",
volume="19",
number="3",
pages="287-300",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}