Козак, О. Ф., О. М. Карпаш, Я. Д. Климишин, and А. В. Яворський. 2008. “The Informatively Measuring Checking of Absorbents Quality System in the Devices of Natural Gas Drainage”. METHODS AND DEVICES OF QUALITY CONTROL, no. 1(20) (April):70-74. https://mpky.nung.edu.ua/index.php/mpky/article/view/128.