Krishan, Neetu Gupta, Deepak. “Performance Analysis of M M 1 N Feedback Queueing System With Balking and Retention of Reneged Customers ”. Journal of Computational Analysis and Applications (JoCAAA), vol. 31, no. 4, Dec. 2023, pp. 2399-12, https://eudoxuspress.com/index.php/pub/article/view/4665.