1. Catalytic Gasification of Active Charcoal by Carbon Dioxide: Influence of Type of Catalyst and Carbon Particle Size;Anita;Fuel,1992
2. Influence of Coal as an Energy Source on Environmental Pollution;Balat;Energy Sources, Part A-Recovery Utilization and Environmental Effects,2007
3. Barnes , I. 2011. Next Generation Coal Gasification Technology. Report No. CCC/187. Clean Coal Center, International Energy Agency, London, United Kingdom. September.