Hazim Alkawaz, Mohammed, Tuerxun Waili, and Nur Aqila Iwana Imran. “Digital Watermark Copyright Protection With QR Code”. International Journal on Perceptive and Cognitive Computing 6, no. 1 (July 2, 2020): 19–23. Accessed September 27, 2021. https://journals.iium.edu.my/kict/index.php/IJPCC/article/view/141.