Mofa, Nina, Assem Kalieva, Tatyana Chernoglazova, Tatyana Shabanova, Zhandarbek Sabayev, Bakhtiyar Sadykov, Timur Oserov, Konstantin Vasin, and Zulkhair Mansurov. 2015. “The Method of Production and Modification of Highly Disperse Silica for Pharmaceutical and Cosmetic Preparations”. Chemical Bulletin of Kazakh National University 80 (4), 20-28. https://doi.org/https://doi.org/10.15328/cb652.