"Public investments in education And energy transition impacts on Cee/ German Transformation". Journal of Economics and Management Sciences 12, no. 12 (يونيو 1, 2012): 1–18. تاريخ الوصول أكتوبر 26, 2026. https://revuejems.univ-setif.dz/index.php/jems/article/view/178.