Fractional-order biological system: chaos, multistability and coexisting attractorsNadjette Debbouche, Adel Ouannas, Shaher Momani, Donato Cafagna and Viet-Thanh PhamEur. Phys. J. Spec. Top., 231 5 (2022) 1061-1070DOI: https://doi.org/10.1140/epjs/s11734-021-00308-5