1. J. J. Spivey, B. H. Carpenter and C. W. Westbrook, Iron Steel Engr59 (9), 49 (1982).
2. R. L. Stephenson, Ed. Direct Reduced Iron, Technology and Economics of Production and Use. ISS of AIME, Warrendale, PA(1980).
3. C. G. Davis, J. F. McFarlin and H. R. Pratt, Ironmaking Steelmaking9 (3), 93 (1982).
4. J. J. Moore, J.Metals134 (6), 39 (1982).
5. K. Otsuka and D. Kunii, J.chem. Engng Japan2 (1), 46 (1969).