1. H. Amann, Fixed point equations and nonlinear eigenvalue problems in ordered Banach spaces, SIAM Rev., 18(4):620–709, 1976.
2. J. Caballero, I. Cabrera, and K. Sadarangani, Positive solutions of nonlinear fractional differential equations with integral boundary value conditions, Abstr. Appl. Anal., 2012:303545, 2012.
3. S. Das, Functional Fractional Calculus for System Identification and Controls, Springer, New York, Toronto, London, 2008.
4. J.R. Graef, L. Kong, Q. Kong, andM.Wang, Uniqueness of positive solutions of fractional boundary value problems with non-homogeneous integral boundary conditions, Fract. Calc. Appl. Anal., 15(3):509–528, 2012.
5. D. Guo and V. Lakshmikantham, Nonlinear Problems in Abstract Cones, Academic Press, New York, 1988.