XALILOV, Sanjar, et al. “USE OF COMPOSITE REAGENTS FOR THE SEPARATION OF NON-FERROUS METALS FROM COALS BY THE FLOTATION METHOD”. «ACTA NUUz», vol. 3, no. 3.2, Sept. 2026, pp. 351-4, http://journals.nuu.uz/index.php/actanuuz/article/view/14829.