@article{ref1,
title="Crash helmets reduce head injuries",
journal="Medical journal of Australia",
year="1973",
author="Kelly, David and Jamieson, K. G.",
volume="2",
number="17",
pages="806-809",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0025-729X",
doi="",
url="http://dx.doi.org/"
}