G. Ayyappan, B. Somasundaram, P. Thamizhselvi. Analysis of M^[X1];M^[X2]/G_1,G2/1 retrial queueing system with priority services, orbital search, compulsory short vacation, optional long vacation, working breakdown and repair under Bernoulli schedule controlled policy. Malaya J. Mat. [Internet]. 2019 Apr. 1 [cited 2024 Jul. 16];7(02):230-44. Available from: https://www.malayajournal.org/index.php/mjm/article/view/703