1. Origin of methane in the Elk Valley coalfield, southeastern British Columbia, Canada;Aravena;Chem. Geol.,2003
2. ASTM, 2007. Annual Book of ASTM Standards: Petroleum Products, Lubricants, and Fossil Fuels; Gaseous Fuels; Coal and Coke, Sec. 5, v. 5.06. ASTM International, West Conshohocken, PA.
3. Chemical and mineralogical differences between Kittanning coals from marine-influenced versus fluvial sequences;Bailey;J. Sediment Petrol.,1981
4. Mixing ratios of volatile organic compounds – VOCs – in the atmosphere of Karachi, Pakistan;Barletta;Atmos. Environ.,2002
5. Beamish, B.B., Crosdale, J.P., 1995. The influence of maceral content on the sorption of gases by coal and the association with outbursting. In: Internat. Symp. Cum Workshop on Management and Control of High Gas Emission and Outbursts, Wollongong, 20–24 March, 1995. Wollongong, Australia.