DJENINA, N.; OUANNAS, A. The fractional discrete model of COVID-19: solvability and simulation. Innovative Journal of Mathematics (IJM), [S. l.], v. 1, n. 1, p. 23–33, 2022. DOI: 10.55059/ijm.2022.1.1/6. Disponível em: https://www.sigmawings.com/journals/index.php/IJM/article/view/6. Acesso em: 20 apr. 2024.