@article{ref1,
title="How can you hang pulleys on girders in the safest manner?",
journal="Zentralblatt fur Arbeitsmedizin und Arbeitsschutz",
year="1961",
author="Muegge, F.",
volume="11",
number="",
pages="143-145",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-4049",
doi="",
url="http://dx.doi.org/"
}