Ali A. Shihab, Mizal H. Al-Obaidi, and Jehan Hamad Hazaa. “Chaotic Diffeomorphism on Manifold (smooth Manifold)”. Tikrit Journal of Pure Science 24, no. 1 (March 18, 2019): 103–106. Accessed June 17, 2025. https://tjpsj.org/index.php/tjps/article/view/338.