1. Lecture Notes in Mathematics;K. Diethelm,2010
2. North-Holland Mathematics Studies;A.A. Kilbas,2006
3. Lakshmikantham, V., Leela, S., Devi, J.V.: Theory of Fractional Dynamic Systems. Cambridge Scientific Publishers, Cambridge (2009)
4. Miller, K.S., Ross, B.: An Introduction to the Fractional Calculus and Differential Equations. Wiley, New York (1993)
5. Podlubny, I.: Fractional Differential Equations. Academic Press, New York (1999)