1. G.de Wit and J. S. Koehler:Phys. Rev., 1959, vol. 116, pp. 1113–20.
2. W. W. Mullins: chapter inMetal Surfaces: Structure, Energetics and Kinetics, p. 17, American Society for Metals, Metals Park, Ohio, 1963.
3. A. K. Head:Phys. Status Solidi, 1967, vol. 19, pp. 185–92.
4. F. C. Frank: chapter inMetal Surfaces: Structure, Energetics and Kinetics, p. 1, American Society for Metals, Metals Park, Ohio, 1963.
5. A. K. Head, M. H. Loretto, and P. Humble:Phys. Status Solidi, 1967, vol. 20, pp. 505–19.