A Numerical Confirmation of a Fractional-Order COVID-19 Model's Efficiency. - Iqbal M. Batiha; Ahmad M. Obeidat; Shameseddin Alshorm; Ahmed Alotaibi; Hajid Alsubaie; Shaher Momani; Meaad Albdareen; Ferjeni Zouidi; Sayed M. Eldin; Hadi Jahanshahi (Symmetry, 2022)