1. 1) O. Umezawa: Bull. Iron Steel Inst. Jpn. 7 (2002) 545–553.
2. 2) H. Yamana, Y. Mizuue, M. Takeuchi and K. Noro: Effects of Cu and Other Tramp Elements on Steel Properties, (ISIJ, 1997) pp. 10–18.
3. 3) N. Sano, H. Katayama, M. Sasabe and S. Matsuoka: Effects of Cu and Other Tramp Elements on Steel Properties, (ISIJ, 1997) pp. 19–29.
4. 4) M. Tanino: Tekko Zairyo no Kagaku (Science on Steel Properties), (Uchida Rokakuho Publishing Co., Ltd., Tokyo, Japan, 2001) pp. 215–230.
5. 5) Y. Saitou, T. Atake and T. Maruyama: JME the Journal of Materials Education, Kinzoku no Kouon Sanka (High-Temperature Oxidation of Metals), (Uchida Rokakuho Publishing Co., Ltd., Tokyo, Japan, 1982) pp. 3–17.