@article{ref1,
title="Algorithms for establishing safe levels of toxic substances in the air of populated areas",
journal="Gigiena i Sanitariia",
year="1990",
author="Rapoport, K. A. and Mitrofanova, N. G. and Safiulin, A. A. and Kriatov, I. A.",
volume="",
number="5",
pages="83-86",
abstract="<p>[Abstract unavailable]</p> <p>Language: ru</p>",
language="ru",
issn="0016-9900",
doi="",
url="http://dx.doi.org/"
}