1. ASTM D1412-07, Standard Test Method for Equilibrium Moisture of Coal at 96 to 97 Percent Relative Humidity and 30°C;American Society for Testing and Materials,2007
2. Coalbed Methane-Fundamental Concepts;Aminian,2005
3. Plotting instantaneous ash versus density;Anonymous;Coal Prep.,1966
4. The direct determination of mineral matter in coal;Bishop;Fuel,1958
5. Effects of carbonate minerals on volatile matter of coals;Choudhury;Fuel,1978