1. Mineral Impurities in Coal Combustion;Raask,1985
2. Mineral Matter and Ash in Coal;Harvey,1986
3. The relation of mineral composition to slagging, fouling and erosion during and after combustion
4. Understanding Slagging and Fouling in PF Combustion;Couch;IEA Report,1994
5. Inorganic Transformations and Ash Deposition During Combustion, Engg. Found. Conf.;Beer,1991