1. Technological framework of coordinated coal mining and coalbed methane;Wang;J. Coal Sci. Eng. (China),2010
2. The researching progress and problems of the extraction of coal and coal-bed methane;Wang;Coal,2010
3. The distribution of hydrogen in coals and its relation to coal structure;Given;Fuel,1960
4. R.M. Devison, Coal Science, Molecular Structure of Coal, 1982.
5. P.R. Solomon, New Approaches in Coal Chemistry, American Chemical Society, 1981.