Suntigul, P., and T. Iyavarakul. “Elderly’s Work Decisions: A Becker Family Economics Analysis of Panel Data”. CRRU Law, Political Science and Social Science Journal, vol. 9, no. 1, Mar. 2025, pp. 232-54, https://so06.tci-thaijo.org/index.php/lawcrru/article/view/276585.