1. Mineral matter in ashy and non-washable coals – its influence on chemical properties;Alpern;Comun Serv Geol Portugal,1984
2. Coal quality assessment – the validity of empirical tests;Carpenter,2002
3. New analysis techniques help control boiler fouling;Karner;Power Eng,1994
4. Kong L, Zygarlicke CJ, Benson SA. Computer controlled SEM analyses of minerals in coal. In: Proceedings of the 13th annual international Pittsburgh coal conference. Energy and Environmental Research Center, Universtiy of North Dakota; 1996. p. 228–33.
5. Laumb M, Benson SA, Laumb J. Ash Behavior in utility boilers: a decade of fuel and deposit analyses. In: United engineering foundation conference on ash deposition and power production in the 21st century, Snowbird, UT, October 28–November 2; 2001.