1. Miller, K.S., and Ross, B. (1993). An Introduction to the Fractional Integrals and Derivatives—Theory and Applications, John Wiley and Sons Inc.
2. Podlubny, I. (1999). Fractional Differential Equations, Academic Press.
3. Wu, Q., and Huang, J.H. (2016). Fractional Order Calculus, Tsinghua University Press.
4. Unique continuation for fractional orders of elliptic equations;Yu;Ann. PDE,2017
5. A fractional Dirac equation and its solution;Muslih;J. Phys. A Math. Theor.,2010