@article{ref1,
title="A few problems on the question of accident frequency in physical education",
journal="Casopis Lekaru Ceskych",
year="1968",
author="Hornof, Z.",
volume="107",
number="30",
pages="937-940",
abstract="<p>[Abstract unavailable]</p> <p>Language: cs</p>",
language="cs",
issn="0008-7335",
doi="",
url="http://dx.doi.org/"
}