1. AISI, 2000. Steel Industry Technology Roadmap. February 1998, American Iron and Steel Institute, available from the World Wide Web, http://www.steel.org/MandT/contents.htm.
2. Standard specifications for coal fly ash and raw or calcined natural pozzolans for use as a mineral admixture in concrete;1996 Annual Book of ASTM Standards,1998
3. Standard test method for determination of crushing strength of iron ore pellets;1998 Annual Book of ASTM Standards,1998
4. Recycling of iron and steelworks wastes using the Inmetco direct reduction process;Bauer;Metallurgical Plant and Technology,1990
5. A simple method of determining the grindability of ores;Berry;Canadian Mining Journal,1966