Drioui, C., B. El Bidaoui, and F. Bakass. “Diffusion Test of Fertility Decline in Arab Countries of the Middle East and North Africa (MENA) Region”. Journal of Population and Social Studies [JPSS], vol. 30, Apr. 2022, pp. 562-90, https://so03.tci-thaijo.org/index.php/jpss/article/view/254884.