@article{ref1,
title="The importance of bicycle helmets",
journal="WMJ (Wisconsin medical journal)",
year="1991",
author="Barkow, K. M.",
volume="90",
number="6",
pages="279-280",
abstract="Abstract unavailable.",
language="",
issn="1098-1861",
doi="",
url="http://dx.doi.org/"
}