@article{ref1,
title="Criteria of calculation methods for the determination of safety levels of harmful substances",
journal="Gigiena Truda i Professional'nye Zabolevaniia",
year="1985",
author="Koviazin, V. G.",
volume="",
number="2",
pages="60-61",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9919",
doi="",
url="http://dx.doi.org/"
}