@article{ref1,
title="Ways to increase the effectiveness of studying the hygienic regulation of harmful substances",
journal="Gigiena i Sanitariia",
year="1979",
author="Kagan, Iu S. and Katsnel'son, B. A. and Kurliandskiĭ, B. A.",
volume="",
number="3",
pages="8-11",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9900",
doi="",
url="http://dx.doi.org/"
}