Prasartkul, P. ., A. . Varangrat, P. . Vapattanawong, and M. . Kanchanakitsakul. “Age - Sex Structure of Aged Population in Thailand”. Journal of Population and Social Studies [JPSS], vol. 8, no. 2, May 2023, pp. 1-16, https://so03.tci-thaijo.org/index.php/jpss/article/view/268523.