1. 5) G. THANING : Ironmaking and Steelmaking, 3 (1976) 2, p. 57
2. 6) B. BJORKVALL and P. A. LLMONI : Rev. Mét., 73 (1976), 9, p. 583
3. 8) V. P. BRATCHENKO, L. Y. GAVRILYUK, N. M. KRYUKOV, A. L. GALATONOV, and F. A. YUSHIN : Steel in USSR 6 (1972), p. 421
4. 9) G. G. EFIMENKO, K. I. KOTOV, I. I. DYSHLEVICH, A. M. ZHAK, and A. I. GURIN : Steel in USSR, 5 (1972), p. 335
5. 19) A. MUAN and E. F. OSBORN : preprint of paper presented before General Meeting of American Inon and Steel Institute at New York, May 23-24 (1951)