1. A. Kojima, K. Yoshii, T. Hada, O. Saeki, K. Ichikawa, Y. Yoshida, Y. Shimura, and K. Azuma: Nippon Steel Tech. Rep., 2004, pp. 33–37.
2. M. Minagawa, K. Ishida, Y. Funatsu, and S. Imai: Nippon Steel Tech. Rep., 2004, pp. 6–8.
3. C. Lee, H. Bhadeshia, and H.-C. Lee: Mater. Sci. Eng., A, 2003, vol. 360, pp. 249–57.
4. A. Kojima, A. Kiyose, R. Uemori, M. Minagawa, M. Hoshino, T. Nakashima, K. Ishida, and H. Yasui: Nippon Steel Tech. Rep., 2004, pp. 2–5.
5. S. Suzuki, K. Ichimiya, and T. Akita: JFE Tech. Rep., 2005, vol. 5, pp. 24–29.