Laacheb, D. and Khaldi, A. (2025) “Demographic projections of the active population in Batna Province and its needs – prospects for 2050 using the spectrum program”, International journal of economic perspectives, 19(9), pp. 86–101. Available at: http://ijeponline.org/index.php/journal/article/view/1153 (Accessed: 13 November 2025).