@article{ref1,
title="Motor activity and the intellectual work capacity of college students",
journal="Gigiena i Sanitariia",
year="1980",
author="Ponomarenko, I. I.",
volume="",
number="2",
pages="27-30",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9900",
doi="",
url="http://dx.doi.org/"
}