@article{ref1,
title="Circadian rhythm of reaction time during night work. II. Relation between mean and range of oscillation",
journal="Internationales Archiv für Arbeitsmedizin",
year="1972",
author="Mann, H. and Rutenfranz, J. and Wever, R.",
volume="29",
number="3",
pages="175-187",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0020-5923",
doi="",
url="http://dx.doi.org/"
}