Gourari, M., and O. AKACEM. “The Impact of Technological Innovation on Improving Enterprise Products- Case Study of National ‎Company for the Maghreb Mattresses- LIT-MAG – Tlemcen. ‎‏ ‏”. Dirassat Journal Economic Issue, Vol. 6, no. 1, Jan. 2015, pp. 107-25, doi:10.34118/djei.v6i1.357.