1. 8) T. YAMAUCHI and S. MARUHASHI : Trans. Iron Steel Inst. Jpn., 23 (1983), p. 752
2. 12) Y. UMEDA, T. IKEDA, T. AOKI and T. MATSUO : The Ninth Japan-USSR Joint Symposium on Physical Chemistry of Metallurgical Processes, ISIJ, Moscow (1983), p. 169
3. 18) R. NACKEN : Zentr. Mineral. Geol. (1919), p. 553
4. 20) M. IWASE, E. ICHISE and N. YAMADA : Iss Trans., 4 (1984), p. 47
5. 21) C. WAGNER : Metall. Trans., 68 (1975), p. 405