@article{ref1,
title="Various trends in studies of physical fitness in sports",
journal="Acta physiologica polonica",
year="1984",
author="Emmerich, J.",
volume="35",
number="Suppl 27",
pages="172-180",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0044-6033",
doi="",
url="http://dx.doi.org/"
}