Kairbekov, Z., Z. Arziev, V. Yemelyanova, and E. Baizhomartov. “The Reception of Humic Derivatives With Increased Sorption Ability on Mineral Matrixes”. Chemical Bulletin of Kazakh National University, Vol. 71, no. 3, Sept. 2013, pp. 136-43, doi:https://doi.org/10.15328/chemb_2013_3136-143.