@article{ref1,
title="Medical control of sport activities in children and adolescents and its organizational forms",
journal="Pediatria Polska",
year="1972",
author="Goncerzewicz, M. and Krawczyński, M. and Cichy, W.",
volume="47",
number="12",
pages="1549-1555",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0031-3939",
doi="",
url="http://dx.doi.org/"
}