1. Annual book of ASTM standards;ASTM D 388–99,2005
2. ASTM Standard D2492-02, 2002. Standard Test Method for Forms of Sulfur in Coal. ASTM International, West Conshohocken, PA (Reapproved 2007).
3. Test Method for Moisture in the Analysis Sample of Coal and Coke;ASTM Standard D3173-11,2011
4. Annual book of ASTM standards;ASTM Standard D3174-11,2011
5. Test Method for Volatile Matter in the Analysis Sample of Coal and Coke;ASTM Standard D3175-11,2011