Khalil Ibrahim, Sundus, and Warkaa Mohammad Hisham Yousif. “Hiding Data in a Text Using Color Variance”. Journal of Education and Science 26, no. 3 (August 1, 2013): 194–215. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/edusj/article/view/41561.