1. V. KHALILEV, M. PETROVSKAYA and G. NIKOLINA,Fiz. Khim. Stekla 1 (1975) 508.
2. A. PRONKIN, Yu. IGITKHANYAN, V. KHALILEV, S. DZHAVUKTSYAN and Yu. TARLAKOV,Fiz. Khim. Stekla 4 (1978) 118.
3. A. PRONKIN, Yu. TARLAKOV, Yu. IGITKHANYAN, S. DZHAVUKTSYAN and V. KHALILEV,Fiz. Khim. Stekla 5 (1979) 252.
4. DDR Patent 153 969 (1982).
5. D. EHRT, A. ROTRAUD and W. VOGEL, 2nd Internationales Otto-Schott Kolloquim, Friedrich-Schiller Universität, Jena (1983) p. 509.