Salahadenova, G., M. Beisebekov, R. Iminova, S. Zhumagaliyeva, M. Beisebekov, and Z. Abilov. “Sorption Low of Ions of Heavy Metals on Organo–mineral Composites”. Chemical Bulletin of Kazakh National University, Vol. 61, no. 1, Mar. 2011, pp. 178-83, https://chemistry.kz/bulletin/index.php/kaznu/article/view/884.