@article{ref1,
title="Motorcycle helmets. last chance for life",
journal="Journal of traffic medicine",
year="1981",
author="Andrews, J. C.",
volume="9",
number="2",
pages="22-25",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0345-5564",
doi="",
url="http://dx.doi.org/"
}