Salahadenova, G., M. Beisebekov, R. Iminova, Sh. Zhumagaliyeva, M. Beisebekov, and Zh. Abilov. 2011. “Sorption Low of Ions of Heavy Metals on Organo–mineral Composites”. Chemical Bulletin of Kazakh National University 61 (1), 178-83. https://bulletin.chemistry.kz/index.php/kaznu/article/view/884.