Therif, A. and Benssassi, I. 2020. 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, 2 (Apr. 2020), 165-192. DOI:https://doi.org/10.34118/djei.v6i2.392.