M, Varalakshmi, Chandrasekaran V M, and Saravanarajan M C. “A Single Server Queue With Immediate Feedback, Working Vacation and Server Breakdown”. International Journal of Engineering & Technology 7, no. 4.10 (October 2, 2018): 476–479. Accessed April 30, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/21044.