EIMAN, A.; ULLAH, Z. .; RAHMAN, N. U. .; ULLAH, F. . Computation of approximate solution to COVID-19 mathematical model. Journal of Mathematical Analysis and Modeling, [S. l.], v. 2, n. 3, p. 21–28, 2021. DOI: 10.48185/jmam.v2i3.347. Disponível em: https://sabapub.com/index.php/jmam/article/view/347. Acesso em: 19 apr. 2026.