1. Thompson D, Argent BB. Unpublished work.
2. Furimsky E, Zheng L, Hlavacek T. Identification and quantification of priority species from coal combustion. Report for the Canadian Electricity Association, No. CEA 9252 G 1015, CANMET, Ottawa, July 1996.
3. Hastie JW, Plante ER, Bonnell DW. Alkali vapor transport in coal conversion and combustion systems. Report to US Department of Commerce National Bureau of Standards, NBSIR 81-2279, May 1981.
4. Anonymous. Vaporization of trace element species from coal under gasification and combustion conditions. Final report on work performed under contract no. DE-AC21-86MC23261 to US Department of Energy Office of Fossil Energy Morgantown Energy Technology Center, March 1989.
5. Fantom IR. Measurement and control of alkali metal vapours in coal derived fuel gases. In: Second International Symposium on Gas Cleaning at High Temperatures, Surrey, UK, 1993.