M. MUSTAFA, K. Use satellite images properties to hide text information. Journal of Education and Science (JES), [S. l.], v. 22, n. 4, p. 171–187, 2009. DOI: 10.33899/edusj.2009.57916. Disponível em: https://ojs.uomosul.edu.iq/index.php/edusj/article/view/24348. Acesso em: 8 aug. 2025.