KHALIL IBRAHIM, S.; سندس; MOHAMMAD HISHAM YOUSIF, W.; ورقاء. hiding data in a text using color variance. Journal of Education and Science (JES), [S. l.], v. 26, n. 3, p. 194–215, 2013. DOI: 10.33899/edusj.2013.89907. Disponível em: https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17434. Acesso em: 4 aug. 2025.