1. G. N. Maslennikova, Yu. T. Platov, and S. Zh. Zhekisheva, “Porcelain stone — nontraditional mineral raw material,” Steklo Keram., No. 11–12, 16–19 (1993).
2. S. Zh. Zhekisheva, Porcelain Stone from the Kyrgyz Republic — a New Nontraditional Ceramic Raw Material [in Russian], Him, Bishkek (1994).
3. A. S. Berezhnoi, Multicomponent Alkaline Oxide Systems [in Russian], Naukova Dumka, Kiev (1988).