@article{ref1,
title="Estimating speed from yawmarks -- an empirical study",
journal="Accident reconstruction journal",
year="1993",
author="Martinez, Luis",
volume="5",
number="3",
pages="48-48",
abstract="unavailable.<p />",
language="",
issn="1057-8153",
doi="",
url="http://dx.doi.org/"
}