@article{ref1,
title="The importance of physical culture and toughening for middle-aged persons",
journal="Voprosy Kurortologii, Fizioterapii, i Lechebnoĭ Fizicheskoĭ Kultury",
year="1967",
author="Kadiev, S. and Ivanova, B.",
volume="32",
number="2",
pages="133-136",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0042-8787",
doi="",
url="http://dx.doi.org/"
}