1. R. J. Stokes, in ?The Science of Ceramic Machining and Surface Finishing?, Vol. I, edited by B. J. Hockey and S. J. Schneider (National Bureau of Standards, Washington, 1972) p. 343.
2. D. Johnson-Walls, A. G. Evans, D. B. Marshall andM. R. James,J. Amer. Ceram. Soc. 69 (1986) 44.
3. E. Klockholm andJ. Wolfe, ?Dead Layers in Mn-Zn and Ni-Zn Ferrites?, Research Report (IBM T. J. Watson Research Center, New York, 1983).
4. ASLE Special Publication 21;S. Chandrasekar,1986
5. B. Lawn andT. R. Wilshaw, ?Fracture of Brittle Solids? (Cambridge University Press, 1976).