1. APLAC (Asia Pacific Laboratory Accreditation Cooperation), 2009. General information on uncertainty of measurement. APLAC TC 010, Issue 1, February 2009.
2. A study on a multi-stage hybrid gasifier-engine system;Bhattacharya;Biomass and Bioenergy,2001
3. High tar reduction in a two-stage gasifier;Brandt;Energy and Fuels,2000
4. Bui, T., 1996. Multi-stage approach wood downdraft gasification. Ph.D. Thesis. Asian Institute of Technology, Thailand.
5. Chinsuwan A., 2008. Numerical and experimental studies on heat transfer in circulating fluidized bed boilers. Ph.D Thesis, Dissertation No. ET-08-05. Asian Institute of Technology.