LAKSHMAN JI, Dr. M.SIVAK KUMAR. “Robust Digital Watermarking Techniques for Protecting Copyright Applied to Digital Data: A Survey”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 3 (April 11, 2021): 3819–3825. Accessed May 5, 2024. https://turcomat.org/index.php/turkbilmat/article/view/1669.