1. Theory and applications of fractional dif- ferential equations;Kilbas,2006
2. An introduction to the fractional calculus and fractional differential equations;Miller,1993
3. Fractional differential equations;Podlubny,1999
4. Modeling the dynamics of novel coronavirus (2019-nCov) with fractional derivative;Khan;Alex Eng J,2020
5. Modeling the dynamics of hepatitis E via the Caputo–Fabrizio derivative;Khan;Math Model Nat Phenom,2019