@article{ref1,
title="Comparison of the circulatory and respiratory functional efficiency of boxers with those of skiers and swimmers",
journal="Casopis Lekaru Ceskych",
year="1963",
author="Horak, J.",
volume="102",
number="",
pages="430-432",
abstract="<p>[Abstract unavailable]</p><p>Language: cs</p>",
language="cs",
issn="0008-7335",
doi="",
url="http://dx.doi.org/"
}