@article{ref1,
title="Causes and prevention possibilities of traffic accidents",
journal="Hefte zur Unfallheilkunde",
year="1961",
author="Friedhoff, E.",
volume="66",
number="",
pages="16-22",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0085-1469",
doi="",
url="http://dx.doi.org/"
}