Anochshenko, Y., V. Dzekunov, D. Kudabekov, and A. Urazalin. “Deposits and Bittern of Saline Lakes As a Promising Feedstock for Sodium Sulfate Production”. Chemical Bulletin of Kazakh National University, Vol. 64, no. 4, Dec. 2011, pp. 20-23, doi:https://doi.org/10.15328/chemb_2011_420-23.