@article{ref1,
title="Possibilities of preventing accidents on contrarotating rollers",
journal="Zentralblatt fur Arbeitsmedizin und Arbeitsschutz",
year="1964",
author="Schumacher, H.",
volume="14",
number="",
pages="131-137",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-4049",
doi="",
url="http://dx.doi.org/"
}