Majeed, Saba Noori. “Dynamical Study of An SIR Epidemic Model With Nonlinear Incidence Rate and Regress of Treatment”. Ibn AL-Haitham Journal For Pure and Applied Sciences 2017, no. IHSCICONF (April 25, 2018): 510–522. Accessed March 27, 2025. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1810.