1. Direct reduced iron. Technology and economics of production and use;Feinman,1999
2. Direct reduction and smelting reduction – an overview;Steffen;Steel Res.,1989
3. The Reduction of Iron Ores: Scientific Basis and Technology;Bogdandy,1971
4. Direct Reduced Iron, Determination of Metallic Iron, Bromine-Methanol Titrimetric Method;ISO 5416,2006
5. Iron Ores, Determination of Various Elements by X-ray Fluorescence Spectrometry, Part 1: Comprehensive Procedure;ISO 9516-1,2003