@article{ref1,
title="Factors that influence the involvement of motorcycle riders",
journal="Proceedings: International Technical Conference on the Enhanced Safety of Vehicles",
year="1993",
author="Koch, H. and Schulz, U.",
volume="1993",
number="",
pages="263-268",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="",
doi="",
url="http://dx.doi.org/"
}