@article{ref1,
title="Are accidents unavoidable?",
journal="Zentralblatt fur Arbeitsmedizin und Arbeitsschutz",
year="1968",
author="Zapp, H.",
volume="18",
number="12",
pages="359-361",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-4049",
doi="",
url="http://dx.doi.org/"
}