Adi, Prajanto Wahyu, and Pramudi Arsiwi. “A Novel Watermarking Method Using Hadamard Matrix Quantization”. Journal of ICT Research and Applications 14, no. 1 (July 28, 2020): 1-15. Accessed October 16, 2025. https://journals.itb.ac.id/index.php/jictra/article/view/10546.