1. 1) M. Kase, M. Sugata, K. Okuda, Y. Umezu, S. Amano, H. Ono and C. Mizuuchi: Tetsu-to-Hagané, 67 (1981), S82.
2. 2) A. Suzawa, Y. Okuno, T. Deno, T. Imai, K. Suzuki and E. Chikamatsu: Tetsu-to-Hagané, 67 (1981), S84.
3. 3) S. Kajikawa, R. Yamamoto, R. Nakajima, J. Kishimoto and T. Fukushima: Tetsu-to-Hagané, 68 (1982), 2361.
4. 4) M. Naito: 179th Nishiyama Memorial Seminar, ISIJ, Tokyo, (2003), 89.
5. 5) N. Sakamoto, H. Noda, Y. Iwata, H. Saito and T. Miyashita: Tetsu-to-Hagané, 73 (1987), 1504.