Digital Color Image Watermarking Using Encoded Frequent Mark. Journal of Engineering, [S. l.], v. 25, n. 3, p. 81–88, 2019. DOI: 10.31026/j.eng.2019.03.07. Disponível em: https://joe.uobaghdad.edu.iq/index.php/main/article/view/775. Acesso em: 29 mar. 2025.