ถมกระจ่าง ธ., and วรรณเมธี เ. “ Nakornratchasima Province”. Journal of Energy and Environment Technology of Graduate School Siam Technology College, vol. 5, no. 1, Mar. 2019, pp. 34-42, https://ph01.tci-thaijo.org/index.php/JEET/article/view/179242.