@article{ref1,
title="Principles and scale of automobile driver tests",
journal="Hefte zur Unfallheilkunde",
year="1968",
author="Lewrenz, H.",
volume="94",
number="",
pages="232-242",
abstract="<p>[Abstract unavailable]</p> <p>Language: de</p>",
language="de",
issn="0085-1469",
doi="",
url="http://dx.doi.org/"
}