8Technical Committee ISO/TC 102. ISO 4698:2007 Iron ore pel- lets for blast furnace feedstocks -Determination of the free-swelling index[ S ]. Switzerland:The International Organization for Stand- ardization, 2007.
9Teehnieal Committee ISO/TC 102. ISO 7215:2007 Iron ores for blast furnace feedstocks-Determination of the reducibility by the fi- nal degree of reduction index [ S ]. Switzerland : The International Organization for Standardization ,2007.