1. Murray, E. P., Tsai, T. & Barnett, S. A. Nature 400, 649–651 (1999).
2. Steele, B. C. H. CR Acad. Sci. 1, Serie IIc, 533-543 (1998).
3. Casanova, A. J. Power Sources 71, 65–70 (1998).
4. Diethelm, R. et al. in Proc. 3rd European SOFC Forum (ed. Stevens, P.) 87-93 (European Fuel Cell Forum, Oberrohrdorf, Switzerland, 1998).
5. Morton, I. in Automotive Engineer June (1999).