@article{ref1,
title="Observation of the motor activity of students during the school day",
journal="Activitas nervosa superior",
year="1969",
author="Gybelová, T.",
volume="11",
number="4",
pages="311-311",
abstract="<p>[Abstract unavailable]</p><p>Language: sk</p>",
language="sk",
issn="0001-7604",
doi="",
url="http://dx.doi.org/"
}