SATHEESH KUMAR KUMARA CHINNAIAN. Unified Payment Ecosystem Architecture (UPEA): A Comprehensive Framework for Modern Payment Processing. International Journal of Computational and Experimental Science and Engineering, [S. l.], v. 12, n. 1, 2026. DOI: 10.22399/ijcesen.4964. Disponível em: https://www.ijcesen.com/index.php/ijcesen/article/view/4964. Acesso em: 26 feb. 2026.