1. Miles TR, Miles Jr TR, Baxter LL, Bryers RW, Jenkins BM, Oden LL. Alkali deposits found in biomass power plants, vols. I & II. Summary Report for the National Renewable Energy Laboratory. NREL Subcontract TZ-2- 11226-1, 1995.
2. Terttaliisa L, Kauppinen EI, Joikiniemi JK, Maenhaut W, Pakkanen TA. Alkali metal behaviour in atmospheric circulating fluidized bed coal combustion. Proceedings of the Engineering Foundation Conference, St. John's Swallow Hotel, Solihull, England, 1993. p. 77.
3. Baxter LL, Jenkins BM, Miles TR, Miles Jr TR, Milne T, Dayton D, Bryers RW, Olden LL. Inorganic material deposition in biomass boilers. Proceedings of the Ninth European Bioenergy Conference, Vol. 2, Copenhagen, 1996. p. 1114.
4. Preparation of silica from rice husks;Real;Journal of American Ceramic Society,1996
5. Benson SA. Ash formation and behavior in utility boilers. Newsletter, Microbeam Technologies Inc., 1998.