Prateek Gupta, Soumya Singh, Rishabh Ranjan, Gaurav Kharayat, Dr. Sreedhara Raman, and Dr. Vedha Balaji. “Analysis of Delivery Issues That Customer Face Upon E-Commerce Shopping”. International Journal of Management Studies (IJMS), vol. 6, no. Spl Issue 3, Sept. 2021, pp. 14-26, https://researchersworld.com/index.php/ijms/article/view/1061.