@article{ref1,
title="Extrinsic trauma and temporomandibular dysfunction",
journal="Cranio",
year="1986",
author="Harkins, S. J.",
volume="4",
number="1",
pages="1-2",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0886-9634",
doi="",
url="http://dx.doi.org/"
}