@article{ref1,
title="Factors associated with pedestrian-vehicle collision injuries and fatalities",
journal="Western journal of medicine",
year="1987",
author="Bergman, A. B. and Rivara, Frederick P. and Mueller, B. A.",
volume="146",
number="2",
pages="243-245",
abstract="Abstract unavailable.",
language="",
issn="0093-0415",
doi="",
url="http://dx.doi.org/"
}