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Valipour MS, and Saboohi, Y, "Numerical investigation of nonisothermal reduction of hematite using Syngas: the shaft scale study", Modelling Simul. Mater. Sci. Eng. 15(5), p. 487, 2007.

Grobler, F. and Minnitt, R.C.A "The increasing role of direct reduced iron in global steelmaking", The Australasian Institute of Mining and Metallurgy.