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2. G. V. Kukolev and I. Ya. Piven', A Book of Problems on the Chemistry of Silicon and the Physical Chemistry of Silicates [in Russian], Moscow (1971).
3. M. N. Kaibicheva and M. G. Shifrina, Ogneupory, No. 6 (1978).
4. M. N. Kaibicheva, Ogneupory, No. 11 (1978).
5. A. S. Berezhnoi, Ogneupory, No. 3 (1960).