Fractional Modelling for COVID-19 in the World and Iraq. Ibn AL-Haitham Journal For Pure and Applied Sciences, [S. l.], 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: 16 jul. 2024.