@article{ref1,
title="Experience with safety helmets",
journal="Zentralblatt fur Arbeitsmedizin und Arbeitsschutz",
year="1967",
author="Albert, O.",
volume="17",
number="3",
pages="78-82",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-4049",
doi="",
url="http://dx.doi.org/"
}