@article{ref1,
title="Severity and types of head trauma among adult bicycle riders",
journal="WMJ (Wisconsin medical journal)",
year="1988",
author="Weiss, Helen and Belongia, E. and Rattanassiri, P. and Bowman, M.",
volume="87",
number="1",
pages="11-14",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1098-1861",
doi="",
url="http://dx.doi.org/"
}