1. T. Saito:Sci. Rep. Res. Inst. Tohoku Univ., Ser. A, 1949, vol. 1, pp. 419–24.
2. W. Wentrup and O. Rief:Arch. Eisenhüttenwes., 1949, vol. 20, pp. 359–62.
3. S. Maekawa and Y. Nakagawa:Tetsu-to-Hagané (J. Iron Steel Inst. Jpn.), 1959, vol. 45, pp. 255–57.
4. R.D. Pehlke and J.F. Elliott:Trans. TMS-AIME, 1960, vol. 218, pp. 1088–1101.
5. I.B. Baratashvili, V.P. Fedotov, A.M. Samarin, and V.M. Berezhiani:Dokl. Akad. Nauk SSSR, 1961, vol. 140, pp. 423–25.