@article{ref1,
title="Causes of maxillo-facial fractures in hospitalized patients",
journal="Proceedings of the Finnish Dental Society supplementum",
year="1978",
author="Lamberg, M. A.",
volume="74",
number="Suppl 5-7",
pages="1-8",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0355-4651",
doi="",
url="http://dx.doi.org/"
}