Islam, Md Khalil, Moin Uddin, and M Osman Gani. “A Unified Dynamical System for Nonlinear Diffusion in the Human Respiratory System”. GANIT: Journal of Bangladesh Mathematical Society 45, no. 2 (December 31, 2025): 018–030. Accessed January 12, 2026. https://www.banglajol.info/index.php/GANIT/article/view/86699.