@article{ref1,
title="Fatigue and driving ability",
journal="Deutsches Medizinisches Journal",
year="1964",
author="Ponsold, A.",
volume="15",
number="",
pages="805-810",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0012-1320",
doi="",
url="http://dx.doi.org/"
}