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2. Impact of mineral impurities in solid fuel combustion;Laursen,1999
3. Impact of mineral impurities in solid fuel combustion;Benson,1999
4. Characteristics of coal ash and mechanism of ash on high temperature condition;Ninomiya;J Jpn Inst Energy,1996
5. Evaluation of melting and deposition phenomena of coal ash on boiler;Ninomiya;J Jpn Inst Energy,1998