devi V. M (X)/G/1 WITH TWO PHASE OF HETEROGENEOUS SERVICE UNDER DIFFERENT VACATION POLICY , RESTRICTED ADMISSIBILITY AND SET UP. JAM [Internet]. 2014 Dec. 2 [cited 2024 Nov. 24];9(5):2687-95. Available from: https://rajpub.com/index.php/jam/article/view/2351