1. Biological elimination of sulphur from high sulphur coal by Aspergillus-like fungi;Acharya;Fuel,2005
2. Biodesulphurisation of coal by microorganisms isolated from the coal itself;Aller;Fuel. Process. Technol.,2001
3. ASTM D3682–13: Standard Test Method for Major and Minor Elements in Combustion Residues from Coal Utilization Processes.
4. ASTM D4239–14 : Standard Test Method for Sulphur in the Analysis Sample of Coal using High-Temperature Tube Furnace Combustion.
5. ASTM D6316–09be1: Standard Test Method for Determination of Total, Combustible and Carbonate Carbon in Solid Residues from Coal and Coke.