@article{ref1,
title="Safety in numbers for walkers and cyclists",
journal="Health promotion journal of Australia",
year="2005",
author="Clarke, C.",
volume="16",
number="2",
pages="159-160",
abstract="Letter  <p>Abstract unavailable</p>",
language="",
issn="1036-1073",
doi="",
url="http://dx.doi.org/"
}