@article{ref1,
title="Economical safety measures in factories with changing shift work",
journal="Zentralblatt fur Arbeitsmedizin, Arbeitsschutz und Prophylaxe",
year="1978",
author="Müller-Seitz, P.",
volume="28",
number="7",
pages="202-206",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0340-7047",
doi="",
url="http://dx.doi.org/"
}