Javali, Sushmitha K. S., and K. Bhavanishankar. “Smart Billing Trolley for Shopping”. International Journal of Research in Engineering, Science and Management 3, no. 8 (August 20, 2020): 337–342. Accessed May 2, 2024. https://journal.ijresm.com/index.php/ijresm/article/view/193.