Nurakhmetova, Z., I. Gussenov, V. Sigitov, and S. Kudaibergenov. “Development of Drilling Fluids Based on Polysaccharides and Natural Minerals”. Chemical Bulletin of Kazakh National University, Vol. 81, no. 1, Mar. 2016, pp. 4-11, doi:https://doi.org/10.15328/cb648.