1. For general texts on fracture see: J.F. Knott, Fundamentals of Fracture Mechanics, Butterworths, 1973. B.R. Lawn and T.R. Wilshaw, Fracture of Brittle Solids, Cambridge Univ. Press, 1975. Two excellent monographs of a more advanced nature are: B.A. Bilby and J.D. Eshelby, Fracture, Vol. 1, p99, Ed. by H. Liebowitz (1968), Academic Press. J.R. Rice, Ibid, Vol. 2, pl91.
2. J. D. Eshelby, Solid State Phys., 3, Ed- by F. Seitz and D. Turnbull, Academic Press, N.Y., 1956.
3. E.R. Fuller and R. Thomson, Fracture Mechanics of Ceramics, Vol. 4, p507, Ed. by R. Bradt et al, Plenum, N.Y., 1978.
4. R. Thomson, J. Matls. Sci., 15, 1027 (1980).
5. G. Barenblatt, Adv. Appl. Mech., 2, 55 (1962).