@article{ref1,
title="Bicycle helmets: effective but underused",
journal="JAMA journal of the American Medical Association",
year="1991",
author="Weiss, Barry D.",
volume="266",
number="21",
pages="3032-3033",
abstract="Abstract unavailable",
language="",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}