@article{ref1,
title="Mouth and jaw protection in contact sports",
journal="British journal of sports medicine",
year="1977",
author="Blonstein, J. L. and Cutler, R. and Mason, M.",
volume="11",
number="2",
pages="75-77",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0306-3674",
doi="",
url="http://dx.doi.org/"
}