1. M. Hatano, T. Miyazaki, T. Shimoda, Y. Iwanaga and T. Kirino, Tetsu-to-Hagané, 66 (1980), S696.
2. T. Miyazaki, T. Shimoda, Y. Iwanaga, K. Yamamoto, I. Shimizu and T. Kataoka, Tetsu-to-Hagané, 67 (1981), A13.
3. K. Hayase, T. Ohshima, H. Fujimori and A. Sasaki, Tetsu-to-Hagané, 67 (1981), A17.
4. C. Yoshii, K. Ishii and T. Konishi, Tetsu-to-Hagané, 63 (1977), S484.
5. S. Kondo, M. Sugata and T. Sugiyama, Gakushin Seisen 54-Committee, No. 1348 (1975).