1. S. M. Wiederhorn ″Fracture Mechanics of Ceramics″ Vol. 4, edited by R. C. Bradt, D. P. H. Hasselman and F. F. Lange (Plenum Publishing Co., New York, 1978) pp. 549–80.
2. Idem, ibid., edited by R. C. Bradt, D. P. H. Hasselman and F. F. Lange (Plenum Publishing Co., New York 1974) pp. 613–46.
3. John E. Ritter, Jr. ″Fracture Mechanics of Ceramics″ Vol. 4, edited by R. C. Bradt, D. P. H. Hasselman and F. F. Lange (Plenum Publishing Co., New York, 1978) pp. 667–86.
4. S. M. Wiederhorn,J. Amer. Ceram. Soc. 50, (1967) 407.
5. A. G. Evans,J. Amer. Ceram. Soc. 57 (1974) 410.