Ø£.ØÙˆØÙˆ, Ù., & Ù„Ø®Ø¶Ø±, Ø. (2014). Ø¯ÙˆØ± ØÙˆÙƒÙ…Ø© Ø§Ù„Ù…Ø¤Ø³Ø³ÙŠØ© Ø§Ù„Ù…ØµØ±ÙÙŠØ© ÙÙŠ Ø§Ø³ØªÙ‚Ø±Ø§Ø± Ø§Ù„Ø£Ø³ÙˆØ§Ù‚ Ø§Ù„Ù…Ø§Ù„ÙŠØ©. RESEARCH OF ECONOMIC AND MANAGERIAL, 16. Retrieved from https://revues.univ-biskra.dz/index.php/rem/article/view/1169