@article{ref1,
title="Maxillo-facial trauma in sports",
journal="Parodontol Stomatol (Nuova)",
year="1986",
author="Balestra, C.",
volume="25",
number="1",
pages="109-115",
abstract="<p>[Abstract unavailable]</p><p>Language: it</p>",
language="it",
issn="0301-1429",
doi="",
url="http://dx.doi.org/"
}