1. K. Segawa, D.S. Kim, Y. Kurusu, and I.E. Wachs, in M.J. Phillips and M. Ternan (Eds.), Proc. 9th Intern. Congr. on Catal., Calgary, 1988, Chem. Institute of Canada, Ottawa, 1988, p. 1960.
2. K. Segawa, T. Soeya, and D.S. Kim, J. Jpn. Petrol. Inst., 33(1990)347.
3. H. Shimada, T. Sato, Y. Yoshimura, and A. Nishijima, J. Catal., 110(1988)275.
4. J. Ramirez, S. Fuentes, and G. Diaz, J. Appl. Catal., 52(1989)211.
5. D.S. Kim, Y. Kurusu, I.E. Wachs, E.D. Hardcastle, and K. Segawa, J. Catal., 120(1989)325.