@article{ref1,
title="Fitness of teenage boys in Poland",
journal="Ergonomics",
year="1979",
author="Palka, M. J.",
volume="22",
number="12",
pages="1291-1299",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0014-0139",
doi="",
url="http://dx.doi.org/"
}