@article{ref1,
title="Tasks of occupational medicine",
journal="ZFA. Zeitschrift für Allgemeinmedizin",
year="1980",
author="Schiller, H.",
volume="56",
number="4",
pages="247-249",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="1433-6251",
doi="",
url="http://dx.doi.org/"
}