1. Carberry, J. J. (1977). Chemical and Catalytic Reaction Engineering. McGraw Hill, New York.
2. Bain, R. (1979). Beneficiation of biomass for gasification and combustion, a survey of biomass gasification, Vol. II. Principles of Gasification, SERI/TR-33-239.
3. Kung H. C. (1974). The burning of vertical wooden slabs. 15 Comb. Symp. 243-53.
4. Kanury, A. M. (1973). Rate of charring combustion in a fire. 14th Symp. ( Intl.) on Combustion, The Combustion Institute.
5. Roberts, A. F. (1971). Problems associated with the theoretical analysis of the burning of wood. 13th Symp. ( Intl.) on Combustion, Combustion Institute, 893.