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2. Tracking study of coal resources exploration status Guo in China;Sun;Coal Geology of China,2017
3. Study on properties of Zhundong coal in Xinjiang region and type-selection for boilers burning this coal sort;Yang;Therm Power Gener,2010
4. Low-grade coals: a review of some prospective upgrading technologies;Hassan;Energy Fuel,2009
5. Low-rank coal drying technologies current status and new developments;Muthusamy;Dry Technol,2009