1. see, for example, Singhal, S., and Kendall, K, Editors, “High Temperature Solid Oxide Fuel Cells: Fundamentals, Design and Applications”, Elsevier (2003).
2. Etsell, T.H., and Flengas, Chem. Rev., (1970) 70, 339.
3. Minh, N.Q., Takahashi, T., in “Science and Technology of Ceramic Fuel Cells, Elsevier, Amsterdam (1995).
4. Ishihara, T., Matsuda, H. and Takita, Y., J. Am. Chem. Soc., (1994) 116, 3801.
5. Steele, B.C.H., in High Conductivity Solid Ionic Conductors, ed: T. Takahashi, World Scientific Press, Singapore (1989).