@article{ref1,
title="A canine in the maxillary antrum",
journal="ZWR",
year="1975",
author="Hatzfeld, G.",
volume="84",
number="4",
pages="155-156",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-166X",
doi="",
url="http://dx.doi.org/"
}