@article{ref1,
title="Preventive dentistry: mouthguards for athletes",
journal="CDS Review",
year="1974",
author="",
volume="67",
number="9",
pages="10-12",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0091-1666",
doi="",
url="http://dx.doi.org/"
}