@article{ref1,
title="Work and rest regimen of coal miners occupied in mining coal in thin seams",
journal="Gigiena Truda i Professional'nye Zabolevaniia",
year="1973",
author="Kazakov, P. M. and Anokhina, R. N.",
volume="17",
number="5",
pages="33-35",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9919",
doi="",
url="http://dx.doi.org/"
}