ABDULLAH, Zahraa K.; OUHIBI , Emna; AL-AZZAWI , Saad Naji. Fractional Modelling for COVID-19 in the World and Iraq. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 37, n. 2, p. 378–387, 2024. DOI: 10.30526/37.2.3359. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/3359. Acesso em: 29 mar. 2025.