Thanarak, P., and C. Chaiyote. “Cost Investigation on Green Fuel Production from Manila Grass Mixed with Crop Residues and GHG Emission Mitigation”. Asian Health, Science and Technology Reports, vol. 19, no. 3, Feb. 2012, pp. 1-9, https://ph03.tci-thaijo.org/index.php/ahstr/article/view/2224.