1. A. I. Avgustinik, in: Studies in the Field of the Chemistry of Silicates and Oxides [in Russian], Nauka, Moscow and Leningrad (1965), p. 241.
2. A. I. Avgustinik, Izv. Akad. Nauk SSSR, Neorg. Mat., 2:1439 (1966).
3. A.I. Avgustinik, G. M. Klimashin, and L. V. Kozovskii, Izv. Akad. Nauk SSSR, Neorg. Mat., 1:830 (1965).
4. A.I. Avgustinik, in: Studies in the Field of the Chemistry of Silicates and Oxides [in Russian], Nauka, Moscow and Leningrad (1965), p. 244.
5. A. I. Avgustinik et al., Izv. Akad. Nauk SSSR, Neorg. Mat., 3:286 (1967).