1. 1) E. P. Murray, T. Tsai, and S. A. Barnett, Nature, 400, 649 (1999).
2. 2) M. Takemura, Y. Ohno, T. Araki, N. Kusama, and M. Takahashi, p. 31, in 7th FCDIC Fuel Cell Symp. Proc., Fuel Cell Development Information Center (2000).
3. 3) K. Yamada, J. Mizusaki, H. Sasaki, A. Tsunoda, H. Yokokawa, Y. Yamazaki, and N. Nakayama, p. 33, in Proc. 4th Intl. Symp. Solid Oxide Fuel Cells, Electrochem. Soc. Proc., 95-1 (1995).
4. 4) M. Pastula, R. Boersma, D. Prediger, M. Perry, A. Horvath, J. Devitt, and D. Ghosh, p. 123, in Proc. 4th Intl. Symp. Solid Oxide Fuel Cell Forum, Ed. by A. J. McEvoy, Luzerne, Switzerland (2000).
5. 5) M. Dokiya, Bull. Ceram. Soc. Japan, 36, 469 (2001)