@article{ref1,
title="Campaigns focus on helmets as safety experts warn bicycle riders to use--and preserve--heads",
journal="JAMA journal of the American Medical Association",
year="1992",
author="Goldsmith, M. F.",
volume="268",
number="3",
pages="308, 311-308, 311",
abstract="Abstract unavailable.",
language="",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}