@article{ref1,
title="Mouthguards in Australian sport",
journal="Australian dental journal",
year="1972",
author="Dennis, C. G. and Parker, D. A.",
volume="17",
number="3",
pages="228-235",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0045-0421",
doi="",
url="http://dx.doi.org/"
}