@article{ref1,
title="System of establishing the safety margin coefficient in setting the MPEL of volatile substances in the air of a work area",
journal="Gigiena Truda i Professional'nye Zabolevaniia",
year="1980",
author="Sidorov, K. K.",
volume="",
number="3",
pages="17-20",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9919",
doi="",
url="http://dx.doi.org/"
}