1. G. S. Perrott and S. P. Kinney:Met. Trans., 1923, vol. 59, p. 543.
2. S. P. Kinney, P. H. Royster, and T. L. Joseph: U. S. Bureau of Mines Tech. Paper 391, 1927.
3. J. F. Elliott, R. A. Buchanan, and J. B. Wagstaff: Blast Furn. Coke Oven and Raw Mater. Proc., Vol. 11, July 1952, pp. 246–47.
4. J. B. Wagstaff:Met. Trans., 1953, vol. 197, pp. 895–902.
5. J. B. Wagstaff and W. H. Holman:Met. Trans., 1957, vol. 209, pp. 370–76.