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2. R. A. Sweetser: Blast Furnace Practice. McGraw-Hill Book Co. New York, 1938.
3. J. B. Wagstaff: Further Studies of the Tuyere Zone of the Blast Furnace. AIME Trans., 1953, vol. 197, pp. 895–902; Journal of Metals, July 1953.
4. G. C. Gardner: Discussion of paper by J. B. Wagstaff. AIME Trans., 1954, vol. 200, p. 1307; Journal of Metals, November 1954.