K. V. Vijayashree , K. Ambika. Transient Analysis of an M/M/1 Queueing Model with Two Kinds of Differentiated Working Vacation. IJCA [Internet]. 2020Jun.1 [cited 2024Apr.20];13(02):1071 -1089. Available from: http://sersc.org/journals/index.php/IJCA/article/view/26885