“A Review on Securing Audio Watermarking System using Discrete Fourier Transform for Copyright Protection”, Int. J. Curr. Eng. Technol., vol. 5, no. 2, pp. 781–784, Apr. 2015, Accessed: Apr. 11, 2026. [Online]. Available: https://ijcet.evegenis.org/index.php/ijcet/article/view/2063