Kumar, Ashish, and NS Raghava. “Selective colour image encryption using Hénon chaotic system with a keyless substitution cipher”. Engineering and Applied Science Research 47, no. 1 (March 17, 2020): 66–76. accessed April 6, 2025. https://ph01.tci-thaijo.org/index.php/easr/article/view/200978.