@article{ref1,
title="Front tooth trauma in child and youth",
journal="Zahnarztebl Baden Wurttemb",
year="1978",
author="Riethe, P.",
volume="6",
number="3",
pages="56-59",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0340-3017",
doi="",
url="http://dx.doi.org/"
}