1. A. G. Evans and T. O. Langdon, Structural Ceramics [Russian translation], Metallurgiya, Moscow (1980).
2. G. S. Pisarenko and V. P. Naumenko, ?Expdrimental methods of fracture mechanics of materials,? Fiz.-Khim. Mekh. Mater., No. 2, 28?41 (1982).
3. A. L. Maistrenko, ?Experimental methods of determining the cracking resistance of superhard materials,? Zavod. Lab.,44, No. 8, 72?78 (1981).
4. J. A. Kies and A. B. J. Clark, ?Fracture propagation rates and time to failure following proof stress in bulk glass,? in: Fracture-69, Proceedings of the Second International Conference on Fracture, Brighton (1969), pp. 483?491.
5. S. W. Freiman, D. R. Mulville, and P. W. Mast, ?Crack propagation studies in brittle materials,? J. Sci.,8, No. 11, 1527?1533 (1973).