@article{ref1,
title="Factors influencing pedestrian and motocyclist fatality risk",
journal="Journal of traffic medicine",
year="1991",
author="Evans, Leonard",
volume="19",
number="2",
pages="69-73",
abstract="<p>Results of this study show that wearing a helmet provides a substantial reduction in fatality risk of 28 plus or minus 8 percent, and that passing mandatory wearing laws generates substantial reductions in casualties.</p>",
language="en",
issn="0345-5564",
doi="",
url="http://dx.doi.org/"
}