@article{ref1,
title="Night and shift work of engine drivers. 3. Investigations on regulations about working hours",
journal="Internationales Archiv für Arbeitsmedizin",
year="1975",
author="Rohmert, W. and Hildebrandt, G. and Rutenfranz, J.",
volume="34",
number="1",
pages="1-23",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0020-5923",
doi="",
url="http://dx.doi.org/"
}