1. Hudson, M.J. and Workman, A.D. (1994) J. Mater. Chem. 4 (8), 1337–1341.
2. W.T. Reichle (1986), Solid State Ionics. 109, 187.
3. Nakatsuka, T., Kawasaki, H., Yamashita, S. and Kohjiya, S. (1979) Bull. Chem. Soc. Jpn. 52, 2449.
4. Cavani, F., Trifiro, F. and Vaccari, A. (1991) Catal. Today
11, 173.
5. Wells, A.F. (1984) Structural Inorganic Chemistry,Oxford University Press, Oxford, 5th Edn., p. 259.