Mohammed Awad Mohammed Ataelfadiel. “Enhancing Digital Security: A QR Code and OTP-Based E-Authentication System”. International Journal of Intelligent Systems and Applications in Engineering 11, no. 4 (September 21, 2023): 911–915. Accessed July 27, 2024. https://ijisae.org/index.php/IJISAE/article/view/6531.