1. Barnhart, D. H., Williams, P. C.: Trans. ASME 78, 1229 (1956).
2. Baxter, L.: Biomass and Bioenergy 4 (2), 89 (1993)
3. Dawson, M., Brown, R., C.: Fuel 71, 585 (1991).
4. Hupa, M., Skrifvars, B-J., Moilanen, A.: J. Inst. Energy 62, 131 (1989)
5. Moilanen, A., Kurkela, E.: Gasifications reactivity of solid biomass fuels, Proc. of the 210th ACS Div. of Fuel Chemistry Conference, Vol. 40, No 3, pp. 688–693, 1995.