1. W. K. Warburton and D. Turnbull:Diffusion in Solids: Recent Developments, A. S. Nowick and J. J. Burton, eds., Academic Press, New York, NY, 1974, p. 171.
2. J. W. Miller:Diffusion Processes, J. N. Sherwood, ed., Gordon and Breach, New York, NY, 1971, p. 203.
3. T.R. Anthony:Vacancies and Interstitials in Metals, A. Seeger, ed., North-Holland Publ., Amsterdam, 1970, p. 935.
4. N.L. Peterson:Solid State Phys., 1968, vol. 26, p. 409.
5. G. Hägg:Z. Phys. Chem., 1929, vol. 6B, p. 221.