1. Theory and Applications of Fractional Differential Equations;Kilbas,2006
2. Fractional Integrals and Derivatives. Theory and Applications;Samko,1993
3. Theory of Fractional Dynamic Systems;Lakshmikantham,2009
4. An Introduction to the Fractional Calculus and Fractional Differential Equations;Miller,1993
5. Some existence theorems on differential equations of generalized order;Al-Bassam;J. Reine Angew. Math.,1965