@article{ref1,
title="Head Injuries In Motor-Cyclists: The Importance Of The Crash Helmet",
journal="British medical journal: BMJ",
year="1941",
author="Cairns, Hugh",
volume="2",
number="4213",
pages="465-471",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}