1. ASTM Standard D2492-02 (2002). Standard Test Method for Forms of Sulfur in Coal. ASTM International, West Conshohocken, PA
2. ASTM Standard D3173-11 (2011). Standard Test Method for Moisture in the Analysis Sample of Coal and Coke. ASTM International, West Conshohocken, PA
3. ASTM Standard D3174-11 (2011). Standard Test Method for Ash in the Analysis Sample of Coal and Coke. ASTM International, West Conshohocken, PA
4. ASTM Standard D3175-11 (2011). Standard Test Method for Volatile Matter in the Analysis Sample of Coal and Coke. ASTM International, West Conshohocken, PA
5. ASTM Standard D3177-02 (2002). Standard Test Methods for Total Sulfur in the Analysis Sample of Coal and Coke. ASTM International, West Conshohocken, PA