@article{ref1,
title="Current problems of industrial hygiene, occupational diseases and industrial toxicology in Bulgaria",
journal="Gigiena i Sanitariia",
year="1971",
author="Trakhtenberg, I. M. and Mirkova, E. T. and Azarova, M. M. and Kynev, G. I. and Kostov, V. P.",
volume="36",
number="4",
pages="85-90",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9900",
doi="",
url="http://dx.doi.org/"
}