1. ASTM D3173/D3173M-17a, 2017. Standard Test Method for Moisture in the Analysis Sample of Coal and Coke. ASTM International, West Conshohocken, PA.
2. ASTM D3174-12, 2012. Standard Test Method for Ash in the Analysis Sample of Coal and Coke from Coal. ASTM International, West Conshohocken, PA.
3. ASTM D3175-17, 2017. Standard Test Method for Volatile Matter in the Analysis Sample of Coal and Coke. ASTM International, West Conshohocken, PA.
4. ASTM D3177-02, 2011. Standard Test Methods for Total Sulfur in the Analysis Sample of Coal and Coke. ASTM International, West Conshohocken, PA.
5. ASTM D388-12, 2012. Standard Classification of Coals by Rank. ASTM International, West Conshohocken, PA.