@article{ref1,
title="The frequency of accidental tooth injuries in school age children",
journal="Zahnarztliche Praxis",
year="1968",
author="Büttner, M.",
volume="19",
number="24",
pages="286-286",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-1651",
doi="",
url="http://dx.doi.org/"
}