@article{ref1,
title="Productivity on a weekly rotating shift system: circadian adjustment and sleep deprivation effects?",
journal="Ergonomics",
year="1986",
author="Vidacek, S. and Kaliterna, L. and Radosevic-Vidacek, Biserka and Folkard, Simon",
volume="29",
number="12",
pages="1583-1590",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}