P. Rajadurai, S. Vaishali, M. Sundararaman, H. Janani, M. Hema, D. Narasimhan. 2020. “An M[X]/G/1 Priority Retrial Queue With Feedback And Working Breakdowns”. International Journal of Advanced Science and Technology 29 (08), 2587 -96. http://sersc.org/journals/index.php/IJAST/article/view/23431.