Boussalem, Aboubaker, and Yassine Boubaker. “The Effect of Depending The Product Development Technical Methods on Creating New Product A Study on the Mobile Services: The Second Generation GSM and The Third 3G”. Milev Journal of Research and Studies 3, no. 1 (June 30, 2017): 559–578. Accessed November 21, 2024. https://jiamcs.centre-univ-mila.dz/index.php/mjrs/article/view/885.