@article{ref1,
title="Do motorcycle helmets affect riders' vision and hearing?",
journal="Annals of emergency medicine",
year="1997",
author="National Highway Traffic Safety Administration, USA, ",
volume="29",
number="2",
pages="282-283",
abstract="Abstract unavailable.",
language="",
issn="0196-0644",
doi="",
url="http://dx.doi.org/"
}