Malligai Selvi.S , Abirami.K. “Discrete Wavelet Transform Based Optoelectronic Water Mark Technology”. International Journal of Emerging Trends in Science and Technology 4, no. 02 (February 28, 2017): 4964–4969. Accessed January 31, 2025. http://igmpublication.com/ijetst.in/index.php/ijetst/article/view/985.