[1]
G. Ayyappan and S. Karpagam, “An $M^{[X]}/G(a,b)/1$ Queueing System with Breakdown and Second Optional Repair, Stand-by Server, Balking, Variant Arrival Rate and Multiple Vacation”, Int. J. Math. And Appl., vol. 6, no. 2 - A, pp. 145–156, May 2018.