@article{ref1,
title="Social hygiene evaluation of students' use of free time",
journal="Gigiena i Sanitariia",
year="1982",
author="Riabova, N. V. and Boiarskiĭ, A. P.",
volume="",
number="2",
pages="48-50",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9900",
doi="",
url="http://dx.doi.org/"
}