@article{ref1,
title="Helmets and preventing motorcycle- and bicycle-related injuries. council on scientific affairs, american medical association",
journal="JAMA journal of the American Medical Association",
year="1994",
author="American Medical Association, ",
volume="272",
number="19",
pages="1535-1538",
abstract="Abstract unavailable.",
language="",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}