1. Test for Equilibrium Moisture of Coal at 96 to 97% Relative Humidity and 30 °C;ASTM D1412-04,2004
2. Standard Test method for Microscopical Determination of the Reflectance of Vitrinite in a Polished Specimen of Coal;ASTM D2798-99,2004
3. Ash in the Analysis Sample of Coal and Coke;ASTM D3174-04,2004
4. Microscopical Determination of Volume Percent of Physical Components of Coal;ASTM D2799-05,2005
5. The influence of maceral content on the sorption of gases by coal and the association with outbursting;Beamish,1995