@article{ref1,
title="Recreation for retired persons",
journal="Zdravotnicka Pracovnice",
year="1977",
author="Kolarík, R.",
volume="27",
number="3",
pages="137-143",
abstract="<p>[Abstract unavailable]</p><p>Language: cs</p>",
language="cs",
issn="0049-8572",
doi="",
url="http://dx.doi.org/"
}