1. Gross Calorific Value of Solid Fuel by the Adiabatic Bomb Calorimeter;ASTM D 2015,1981
2. Gross Calorific Value of Solid Fuel by the Isothermal-Jacket Bomb Calorimeter;ASTM D 3286,1981
3. Calorific Value of Coal;Selvig,1945
4. How to calculate Btu values of coal;Subramanian;Coal Age,1977