Hachemi Baadj, Mohamad Badaoui, Mohamad Doua, karim Bouaissa. “Queueing Theory and Their Role in Measuring Service Performance: An Analytical and Applied Study of the Mobilis Agency – Laghouat, Algeria”. European Economic Letters (EEL) 14, no. 4 (November 14, 2024): 229–235. Accessed July 28, 2026. https://www.eelet.org.uk/index.php/journal/article/view/2116.