1. Campbell, E.K. and Davidson, J.F., 1975, The Combustion of Coal in Fluidized Beds, Inst. of Fuel Sym. Ser., No. 1, A2-1.
2. Ergun, S., 1952, Chem. Eng. Progr. 48, 89.
3. Gibson, J., 1977, Present Status of Fluidized Bed Combustion, Applied Energy, 3, 87.
4. Kunii, D., and Levenspiel, O., 1968, "Fluidization Engineering", John Wiley, Sons, Inc., New York.
5. Levi, G., Schächter, O., Basevi, E., Clark, E.L. and Gottesman, E., 1957, Power Generation by Combustion of Oil Shale, World Power Conf. Sec. B.2, Yugloslavia.