1. 1) D. F. Ball, J. Dartnell, J. Davison, A. Grieve and R. Wild: Agglomeration of Iron Ores, American Elsevier Publishing Co., New York, (1973), 1.
2. 2) D. F. Ball, J. T. Fitton, P. R. Dawson and D. C. Goldring: Trans. Inst. Min. Metall., Sec. C, 83 (1974), C47.
3. 3) A. R. Firth: Trans. Inst. Min. Metall., Sect. C, 116 (2007), 93.
4. 4) J. D. Zetterström: Report of Investigations 4728, Department of Interior, B. o. Mines, Washington, DC, (1950), 1.
5. 5) D. Papanastassiou and G. Bitsianes: Metall. Mater. Trans. B, 4 (1973), 487.