1. U. R. Evans, ?The corrosion and oxidation of metals? (Edward Arnold, London, 1960) p. 962.
2. D. R. Turner, J. Electrochem. Soc. 107 (1960) 810.
3. H. C. Gatos and M. C. Lavine, in ?Progress in semiconductors?, Vol. 9, edited by A. F. Gibson and R. E. Burgess (Heywood, London, 1965) p. 1.
4. R. W. Haisty, J. Electochem. Soc. 108 (1961) 790.
5. J. H. Braun, ibid 108 (1961) 588.