@article{ref1,
title="Effect of physical training on the health status and mental work capacity of schoolchildren",
journal="Gigiena i Sanitariia",
year="1989",
author="Filippova, A. G. and Kochetkova, M. T. and Lesnenko, N. A.",
volume="ePub",
number="6",
pages="42-44",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9900",
doi="",
url="http://dx.doi.org/"
}