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3. D. J. Gerry and J. O. Autwater, in: Strength of Glass [Russian translation], Mir, Moscow (1969).
4. V. S. Kashperiskii, N. V. Skvortsova, and A. E. Zhuravel', ?Mechanical properties of pyroceramics in bending, stretching, and compression?, Probl. Prochn., No. 4 (1971).
5. Catalog of Technical Pyroceramics [in Russian], Stroiizdat, Moscow (1969).