Therif, Amina, and Ilyes Benssassi. “Innovation in the Promotional Mix Elements and Its Impact on ‎the Rapid Spread of New Products An Analytical Study of the Opinions of a Sample of Beneficiaries Display ‎smartphone "Lenovo”. Dirassat Journal Economic Issue 6, no. 2 (April 21, 2020): 165-192. Accessed July 22, 2024. http://journals.lagh-univ.dz/index.php/djei/article/view/392.