G. Ayyappan, & S.Shyamala. (2013). Transient solution of an \(M^{[X]} / G / 1\) queuing model with feedback, random breakdowns and Bernoulli schedule server vacation having general vacation time distribution. Malaya Journal of Matematik, 1(02), 68–76. https://doi.org/10.26637/mjm102/009