1. J.P. Van Hook, Catalysis Rev. Sci. Eng., 21 (1981) 1.
2. J.R. Rostrup-Nielsen, in J.R. Anderson and M. Boudart (eds.), Catalytic Steam Reforming, Catalysis, Science and Engineering. Springer-Verlag, Berlin, Vol. 5, 1984.
3. M.V. Twigg, Catalyst Handbook, 2nd edition, Wolfe Publishing, London, 1989.
4. S. Freni and G. Maggio, Int. J. Energy Res., 21 (1997) 253.
5. K. Sato, T. Tanaka and T. Murahashi, 1990 Fuel Cell Seminar Abstracts, 40 (1990) 40.