T.D. Dzhienalyev, A.A. Biryukova,. “Ceramic Proppants Based On High-Ferrous Bauxite”. International Journal of Advanced Science and Technology 28, no. 16 (December 10, 2019): 724 - 731. Accessed May 4, 2024. http://sersc.org/journals/index.php/IJAST/article/view/1946.