Meesuk, P. ., and S. . Changjan. “Development of a rice drying machine using solar energy combined with a heater”. Journal of Bansomdej Engineering and Industrial Technology, vol. 2, no. 2, Dec. 2021, pp. 28-41, https://ph04.tci-thaijo.org/index.php/JEITB/article/view/4510.