1. 14) K. NAKANISHI, K. SAITO, T. NOZAKI, Y.KATO, K.SUZUKI and T. EMI : 65th Steelmaking Conference of AIME(1982), p. 101
2. 15) J.NAGAI, T. YAMAMOTO, H. YAMADA, H. TAKE, R.TACHIBANA, K. NAKANISHI and Y. IIDA : Kawasaki Steel Technical Report, 6(1982)Sep., p.12