Design of a Web-Based SPMNB System Integrated with a Payment Gateway Using the Waterfall Method at SMPS Daarut Tasbih Ar-Rafi. Technema: Journal of Intelligent Engineering and Computing, [S. l.], v. 1, n. 3, p. 186–201, 2026. Disponível em: https://sovereignresearch.org/technema/article/view/293. Acesso em: 3 sep. 2026.