@article{ref1,
title="Exemptions from wearing motorcycle helmets",
journal="Medical journal of Australia",
year="1992",
author="Brazenor, G. A. and Dan, N. G. and Simpson, D. A.",
volume="156",
number="5",
pages="362-362",
abstract="Abstract unavailable.",
language="",
issn="0025-729X",
doi="",
url="http://dx.doi.org/"
}