Balykbaeva, G., K. Erimbetov, G. Malikova, and K. Musabekov. “Purification of Syrdarya Waters from Pathogenic Bacteria by Bentonitic Clays”. Chemical Bulletin of Kazakh National University, Vol. 67, no. 3, Sept. 2012, pp. 159-63, doi:https://doi.org/10.15328/chemb_2012_3159-163.