G. Kannadasan, D. Devi, and N. Sathiyamoorthi. “The Analysis of the M/M/1 Queue With Two Vacation Policies Using Pentagonal Fuzzy Numbers”. Malaya Journal of Matematik 7, no. 03 (July 1, 2019): 526–531. Accessed July 16, 2024. https://www.malayajournal.org/index.php/mjm/article/view/747.