@article{ref1,
title="Shiftwork in industry",
journal="International journal of industrial ergonomics",
year="1988",
author="Konz, S.",
volume="3",
number="1",
pages="77-81",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0169-8141",
doi="",
url="http://dx.doi.org/"
}