@article{ref1,
title="Maxillofacial injuries in football players: an evaluation of current facial protection",
journal="Journal of sports medicine and physical fitness",
year="1971",
author="Rontal, E. and Rontal, M.",
volume="11",
number="4",
pages="241-245",
abstract="<p>[Abstract unavailable]  Keywords: American football  </p> <p>Language: en</p>",
language="en",
issn="0022-4707",
doi="",
url="http://dx.doi.org/"
}