1. R. W. Bartlett and H. H. Haung:J. Metals, 1973, vol. 25, no. 12, pp. 28–34.
2. F. P. Haver and M. M. Wong:Mining Eng., 1972, vol. 24, no. 6, p. 52.
3. J. H. Strassberger,et al: Blast Furnace Theory and Practice, vol. 1, p. 286, Gordon and Breach Science Publishers, New York, 1969.
4. N. Froessling:Gerlands Beitr. Geophys., 1938, vol. 52, p. 1183.
5. R. L. Steinberger and R. E. Treybal:AIChEJ., 1960, vol. 6, p. 227.