Karpagam, S. “ Analysis of Bulk Service Queuing System With Rework, Unreliable Server, Resuming Service and Two Kinds of Multiple Vacation”. Yugoslav Journal of Operations Research 33, no. 1 (May 4, 2022): 17–39. Accessed August 25, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/722.