Seenivasan, M., and K. S.Subasri. “Batch Arrival Queueing Model With Unreliable Server”. International Journal of Engineering and Technology 7, no. 4.10 (October 2, 2018): 269–273. Accessed August 17, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/20910.