Pholuang, Jutatat, Sirorath Channgam, and Wiriyabhon Klomsungcharoen. 2023. “Mathematical Model for Forecasting the Number of Aging Societies in Pathum Thani Province”. SciTech Research Journal 6 (1). Maha Sarakham, Thailand:14-30. https://ph02.tci-thaijo.org/index.php/jstrmu/article/view/247872.