HAZEM, Mohamed. “REGIONAL CONVERGENCE IN NORTH AFRICA REGIONS : PARAMETRIC AND NON PARAMETRIC APPROACHES ”. International Journal of Business and Social Science Research 2, no. 1 (January 13, 2021): 13–19. Accessed April 21, 2026. https://www.ijbssrnet.com/index.php/ijbssr/article/view/39.