U. Sarkar, A.K. Jalan, and B.C. Giri. “An Integrated Vendor-Buyer Model With Exponentially Increasing Demand in Fuzzy Environment”. International Journal of Management Studies (IJMS), vol. 5, no. 3(5), Nov. 2021, pp. 69-77, https://researchersworld.com/index.php/ijms/article/view/1926.