G. Kannadasan, D. Devi, N. Sathiyamoorthi. The analysis of the M/M/1 queue with two vacation policies using pentagonal fuzzy numbers. Malaya J. Mat. [Internet]. 2019 Jul. 1 [cited 2024 Jul. 16];7(03):526-31. Available from: https://www.malayajournal.org/index.php/mjm/article/view/747