@article{ref1,
title="Psychogenic trauma",
journal="Dental survey",
year="1967",
author="Goldstein, I. C. and Dragon, A. I.",
volume="43",
number="1",
pages="74-75",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0011-8788",
doi="",
url="http://dx.doi.org/"
}