ฤทธิ์สกุลชัย ส. (2019) “Thai Special Economic Zone and Economic Border : Case Study of Wan Yai District, Mukdahan Province”, Chophayom Journal, 30(2), pp. 69–78. available at: https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/208052 (accessed: 14 September 2026).