@article{ref1,
title="Children's accidents during compulsory sports activities during school competitions",
journal="Zahnarztliche Praxis",
year="1970",
author="Kessler, B.",
volume="21",
number="14",
pages="157-158",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-1651",
doi="",
url="http://dx.doi.org/"
}