Kittilertpaisan, Jitti, Kallaya Kittilertpaisan, and Phakhaphon Khatiwat. “Technical Efficiency of Rubber Farmers’ in Changwat Sakon Nakhon: Stochastic Frontier Analysis”. International Journal of Economics and Financial Issues 6, no. 6S (October 4, 2016): 138–141. Accessed November 15, 2024. https://econjournals.net.tr/index.php/ijefi/article/view/3144.