@article{ref1,
title="Development of automobile driver examinations. Historical review--administrative evaluation",
journal="Medizinische Welt",
year="1972",
author="Lewrenz, H.",
volume="23",
number="16",
pages="617-621",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0025-8512",
doi="",
url="http://dx.doi.org/"
}