1. Results of CUB leaching studies: metal solubility;Kim,2003
2. Mineral matter in coal;Mackowsky,1968
3. Occurrence, abundance and origin of minerals in coals and coal ashes;Vassilev;Fuel Process Technol,1996
4. Trace elements—emission from coal combustion and gasification;Clarke,1992
5. Physical and chemical CCB characteristics;Kim,2002