Sitthisuntikul, K., S. Kaewthip, P. Kavichai, S. Pattanapaiwan, and O. Ongla. “Gap Analysis of Key Development Issues for Sustainable Development in Northern Thailand”. Thammasat Journal, vol. 43, no. 2, Aug. 2024, pp. 133-51, https://so05.tci-thaijo.org/index.php/tujo/article/view/275231.