Ayyappan, G. and J, U. (2020) “Transient Analysis of M[X1],M[X2]/G1,G2/1 retrial queueing system with priority services, working breakdown, start up close down time, Bernoulli vacation, reneging and balking”, Pakistan Journal of Statistics and Operation Research, 16(1), pp. 203-216. doi: 10.18187/pjsor.v16i1.2181.