1. http://www.fossil.energy.gov/programs/powersystems/publications/Brochures/Gasification_technologies.pdf
2. G. Stiegel S. Clayton Proceedings from the Gasification Technologies 2001 Annual Meeting http://www.gasification.org/Docs/2001_Papers/GTC01053.pdf
3. Coal-Ash Slag Attack and Corrosion of Refractories;Bonar;Am. Ceram. Soc. Bull.,1980
4. P. Amick asification Technologies Conference http://www.gasification.org/Docs/2000_Papers/Gtc00180.pdf
5. N. Holt Western Fuel Symposium