1. Determination of the grindability of coals, shales and other minerals by a modified Hardgrove-machine method;Agus;Fuel,1971
2. Australian Standard™ Coal and Coke—Analysis and Testing, Part 20: Higher Rank Coal—Hardgrove Grindability Index;AS1038.20-2002,2002
3. Australian Standard™ Coal and Coke—Analysis and Testing Part 3: Proximate Analysis of Higher Rank Coal;AS1038.3-2000,2000
4. AS1152-1993, 1993. Australian Standard® Specification for Test Sieves.
5. Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method;ASTM-D409-02,2002