Ergozhin, E., B. Tausarova, R. Ashkeeva, and L. Tugelbaeva. “Complexing Sorbents for Wastewater Purification”. Chemical Bulletin of Kazakh National University, Vol. 73, no. 1, Mar. 2014, pp. 94-99, doi:https://doi.org/10.15328/chemb_2014_194-99.