1. Bazhlekova, E. (2001). Fractional Evolution Equations in Banach Spaces. [Ph.D. Thesis, Eindhoven University of Technology].
2. Diethelm, K. (2010). The Analysis of Fractional Differential Equations, Springer. Lecture Notes in Mathematics.
3. Kilbas, A.A., Srivastava, H.M., and Trujillo, J.J. (2006). Theory and Applications of Fractional Differential Equations, Elsevier Science B. V.. North-Holland Mathematics Studies.
4. Kostić, M. (2015). Abstract Volterra Integro-Differential Equations, CRC Press.
5. Podlubny, I. (1999). Fractional Differential Equations, Academic Press.