1. T. Abdeljawad, D. Baleanu, Fractional differences and integration by parts. J. Comput. Anal. Appl. 13 (2011), 574–582.
2. T. Abdeljawad, On Riemann and Caputo fractional differences. Comput. Math. Appl. 62 (2011), 1602–1611.
3. T. Abdeljawad, On delta and nabla Caputo fractional differences and dual identities. Discrete Dyn. Nat. Soc. 2013 (2013).
4. F.M. Atici, P.W. Eloe, A transform method in discrete fractional calculus. Int. J. Differ. Equ. 2 (2007), 165–176.
5. F.M. Atici, P.W. Eloe, Initial value problems in discrete fractional calculus. Proc. Am. Math. Soc. 137 (2009), 981–989.