1. 1) M. ELLE and J. CHIPMAN: Trans. AIME, 221 (1961), p.701
2. 5) JIS G 1231
3. 7) J. P. FLORIDIS and J. CHIPMAN: Trans. AIME, 212 (1958), p.549
4. 11) J. P. COUGHLIN: U. S. Bur. Mines, Bull, No.542 (1954)
5. 12) J. F. ELLIOTT and M. GLEISER: Themochemestry for Steelmaking. Addison Wesley Publ. Co, Reading, Mass., (1960)