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2. Activation Energy of Diffusion of Gases into Porous Solids;Anderson;Fuel.,1965
3. Dependence of Methane Contents in Brown Coal and Lignite Seams on Depth of Occurrence and Natural Conditions;Basic,1989
4. Methane Emissions from Coal Mining: Issues and Opportunities for Reduction;Boyer,1990
5. Biogeochemical Aspects of Atmospheric Methane;Cicerone;Global Biogeochemical Cycles,1988