1. Zhong W, Lin W: Nonlocal and multiple-point boundary value problem for fractional differential equations. Comput. Math. Appl. 2010, 39: 1345-1351.
2. Ahmad B, Nieto JJ: Riemann-Liouville fractional integro-differential equations with fractional nonlocal integral boundary conditions. Bound. Value Probl. 2011., 2011: Article ID 36
3. Alsaedi A, Ntouyas SK, Ahmad B: Existence results for Langevin fractional differential inclusions involving two fractional orders with four-point multiterm fractional integral boundary conditions. Abstr. Appl. Anal. 2013., 2013: Article ID 869837
4. Podlubny I: Fractional Differential Equations. Academic Press, San Diego; 1999.
5. Kilbas AA, Srivastava HM, Trujillo JJ North-Holland Mathematics Studies 204. In Theory and Applications of Fractional Differential Equations. Elsevier, Amsterdam; 2006.