URINOV, Olim, et al. “TECHNOLOGY AND DETERMINATION OF OPTIMAL CONDITIONS FOR PRODUCING CLAYACTIVATED COAL-BASED SORBENTS FOR COMPRESSOR OIL PURIFICATION”. «ACTA NUUz», vol. 3, no. 3.3, Sept. 2026, pp. 379-81, http://journals.nuu.uz/index.php/actanuuz/article/view/15065.