Lhapeerakul , P. ., and Y. . Zhai. “An Analysis of Obstacles, Problems, and Sustainable Development Strategies for ‘City Diplomacy’ Operations Between Chiang Rai and Yunnan”. Thammasat Review, vol. 27, no. 1, June 2024, pp. 27-51, https://sc01.tci-thaijo.org/index.php/tureview/article/view/240766.