@article{ref1,
title="On problems of work organization in shift labor from the industrial hygiene viewpoint",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1967",
author="Quaas, M.",
volume="13",
number="9",
pages="648-651",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}