Nurgain, A., M. Nazhipkyzy, A. A. Zhaparova, A. T. Issanbekova, M. Alfe, and A. S. Musina. 2020. “Acid Modification of Diatomite-Based Sorbents”. Eurasian Chemico-Technological Journal 22 (3):157-64. https://doi.org/10.18321/ectj975.