Ayyappan, Govindhan, and Udayageetha J. 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), 203-16. https://doi.org/10.18187/pjsor.v16i1.2181.