Shangkhum, P., and D. Kesavayuth. “How Subjective Well-Being and Physical Health Are Linked: Mediation Analysis”. Thammasat Review of Economic and Social Policy, vol. 7, no. 1, June 2021, pp. 50-83, https://so04.tci-thaijo.org/index.php/TRESP/article/view/252628.