Adil, Argabi, Taleb Amar, and Salhaoui Samir. “Entry and Exit Barriers and Their Impact on Industry Performance -A Case Study of the Mobile Phone Service Industry in Algeria”. The journal of contemporary issues in business and government 29, no. 4 (December 30, 2023): 1–15. Accessed June 30, 2024. https://cibgp.com/au/index.php/1323-6903/article/view/2629.