Bouchentouf, Amina Angelika, Mohamed Boualem, Mouloud Cherfaoui, and Latifa Medjahri. “Variant Vacation Queueing System With Bernoulli Feedback, Balking and server’s States-Dependent Reneging”. Yugoslav Journal of Operations Research 31, no. 4 (November 1, 2021): 557–575. Accessed August 25, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/684.