1. See e. g. F. Seitz in “Imperfections in Nearly Perfect Crystals”, Ed. by W. Shockley et al,, ( Wiley, New York, 1952 ) p. 3.
2. C. P. Flynn, Point Defects and Diffusion (Oxford University Press, 1972 ).
3. F. A. Kroger, Chemistry of Imperfect Crystals (North Holland, Amsterdam, 1964 ).
4. Theory of Imperfect Crystalline Solids - Trieste Lectures 1970 (International Atomic Energy Agency, Vienna, 1971).
5. J. H. Crawford and L. M. Slifkin, Eds., Point Defects in Solids Vols. 1 and 2 ( Plenum, New York and London 1972 ).