Stihi, Nadjet, and Natalia Djellab. “Approximation of the Steady State System State Distribution of the M G 1 Retrial Queue With Impatient Customers”. Yugoslav Journal of Operations Research 22, no. 2 (September 1, 2012): 285–296. Accessed August 27, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/344.