1. 1) M. KAWAKAMI and K. ITO : Proc. the 4th Japan-Nordic Countries Joint Symposium on Science and Technology of Process Metallurgy, Tokyo (1986), p.136
2. 2) T. HAMADA, Y. TAKADA, K. IGAWA, H. KATAYAMA, S. TAKEUCHI, T. FUKUTAKE and K. NAKANISHI : Proc. International Symposium on Smelting Reduction, Shenyang (1986), p.272
3. 9) H. KATAYAMA, M. FUJITA, M. KUWABARA, H. ISHIKAWA and H. KAJIOKA : Proc. The 10th Japan-USSR Joint Symposium on Physical Chemistry of Metallurgical Process, Tokyo (1985), p.75
4. 23) K. MARUKAWA, S. ANEZAKI, T. HIRATA and M. ISHIKAWA : Proc. International Symposium on Smelting Reduction, Shenyang (1986), p.304
5. 25) H. KATAYAMA, M. FUJITA, H. ISHIKAWA and H. KAJIOKA : Proc. International Symposium on Smelting Reduction, Shenyang (1986), p.290