Le, D. P. C., Nguyen, N. T., Nguyen, X. T., & Bui, M. Q. (2025). An E-Commerce Web Simulation System (UPT-Shopping): Integrating PayPal and Chatbot-AI to Support Users in Payment and Quick Response. The University of Phan Thiet Journal of Science, 3(3), 32-40. https://tapchikhoahocupt.vn/index.php/uptjs/article/view/uptjs-56-2025