@article{ref1,
title="The mandatory motorcycle helmet law issue in Arkansas: the cost of repeal",
journal="Journal of the arkansas medical society",
year="1990",
author="Rollberg, C. A.",
volume="86",
number="8",
pages="312-316",
abstract="Abstract unavailable.",
language="",
issn="0004-1858",
doi="",
url="http://dx.doi.org/"
}