@article{ref1,
title="Loading, functional limits and fatigue in motor vehicle drivers",
journal="Hefte zur Unfallheilkunde",
year="1967",
author="Hoffmann, H.",
volume="91",
number="",
pages="113-122",
abstract="<p>[Abstract unavailable]</p> <p>Language: de</p>",
language="de",
issn="0085-1469",
doi="",
url="http://dx.doi.org/"
}