1. Alvaredo, A.M., Hu, X-Z. and Wittmann, F.H., 1989, A numerical study of the fracture process zone, in: “Fracture of Concrete and Rock: Recent Developments,” S.P. Shah, S.E. Swartz and B. Barr, eds., Elsevier, London.
2. Atkins, A.G. and Mai, Y-W., 1985, “Elastic and Plastic Fracture: Metals, Polymer, Ceramics, Composites, Biological Materials,” Ellis Horwood Limited, London.
3. Becher, P.F., 1981, Transient thermal stress behaviour in ZrO2 toughened Al2O3,“ J. Amer. Ceram. Soc., 64:37.
4. Becher, P.F. and Tennery, V.T., 1983, Fracture toughness of Al203-Zr02 composites, in: “Fracture Mechanics of Ceramics,” R.C. Bradt, A.G. Evans, D.P.H. Hasselman and F.F. Lange, eds., Plenum Press, New York-London.
5. Budiansky, B., Hutchinson, J.W. and Lambropoulos, J.C., 1983, Continuum theory of dilatant transformation toughening in ceramics, Int. J. Solids Struct., 19:337.