G. AYYAPPAN; 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. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 2 - A, p. 145–156, 2018. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/657. Acesso em: 22 jul. 2024.