@article{ref1,
title="Physiological, psychological and hygienic requirements for lighting of the working place",
journal="Zentralblatt fur Arbeitsmedizin und Arbeitsschutz",
year="1975",
author="Hentschel, H. J.",
volume="25",
number="11",
pages="326-332",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-4049",
doi="",
url="http://dx.doi.org/"
}