@article{ref1,
title="Operation mouthguard: a model program designed to prevent dental trauma",
journal="ASDC journal of dentistry for children",
year="1982",
author="Blum, J. and Kranz, S.",
volume="49",
number="1",
pages="22-24",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1945-1954",
doi="",
url="http://dx.doi.org/"
}