1. C. V. Firth:Proceedings, Blast Furnace, Coke Oven and Raw Materials Conf., AIME, 1944, vol. 4, pp. 46-69.
2. M. Tigerschiöld and P. A. Ilmoni:ibid., 1950, vol. 9, pp. 18-45.
3. G. V. Struve, W. Stieger, and B. Müller: Stahl Eisen, vol. 91, 1971. pp. 971–78, also pp. 979-80.
4. R. B. Cooke and T. E. Ban:Trans. AIME, 1952, vol. 193, pp. 1053–58.
5. S. R. B. Cooke and W. F. Stowasser:Trans. AIME, 1952, vol. 193, pp. 1223–30.