@article{ref1,
title="Social significance of sport activity and accident frequency",
journal="Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca",
year="1968",
author="Friedberger, V.",
volume="35",
number="1",
pages="61-71",
abstract="<p>[Abstract unavailable]</p><p>Language: cs</p>",
language="cs",
issn="0001-5415",
doi="",
url="http://dx.doi.org/"
}