@article{ref1,
title="Certain data on the physical work capacity in children of the older preschool group",
journal="Voprosy Okhrany Materinstva i Detstva",
year="1974",
author="Iashchenko, L. B.",
volume="19",
number="2",
pages="59-63",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0042-8825",
doi="",
url="http://dx.doi.org/"
}