1. E.A. Sandreal, R.C. Ellman, Laboratory Determination of Factors Affecting Storage of North Dakota Lignite, Report of Investigation No. 7887, US Bureau of Mines, 1994.
2. Drying and devolatilization of large coal particles under combustion conditions;Wildegger-Graissmaier;Fuel,1990
3. W. Prins, Fluidized bed combustion of a single carbon particle, PhD thesis, University of Twente, Netherlands, 1987.
4. J.P. Waters, Factors influencing the fluidised bed combustion of low grade solid and liquid fuels, Proc. 1st FBC Symposium Inst. of Energy, paper C6-1, 1970.
5. Physical changes accompanying drying of Western US lignites;Deevi;Fuel,1987