1. L. YOUNG, “Anodic Oxide Films” (Academic Press, New York, 1961).
2. A. K. VIJH, “Electrochemistry of Metals and Semiconductors” (Marcel Dekker, New York, 1973) Chap. 5.
3. J. W. DIGGLE, T. C. DOWNIE and C. W. GOULDING,Chem. Revs. 69 (1969) 365.
4. R. L. RICKETT, in “Metals Handbook”, edited by T. Lyman (American Society for Metals, Ohio, 1960) p. 1217.
5. A. K. VIJH,Corrosion Sci. 11 (1971) 411.