@article{ref1,
title="Trends in head injuries and helmet use in cyclists at an inner-city major trauma centre, 1991-2010",
journal="Medical journal of Australia",
year="2011",
author="Rissel, Chris E. and Martin, Paul",
volume="194",
number="4",
pages="215-216",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0025-729X",
doi="",
url="http://dx.doi.org/"
}