1. G. A. Afrouzi and A. Hadjian, Existence and multiplicity of solutions for a discrete nonlinear boundary value problem, Electr. J. Differ. Equ., 35(2014), 1-13.
2. H. Amann, Fixed point equations and nonlinear eigenvalue problems in ordered Banach spaces, SIAM Review, 18(1976), 620-709.
3. D. R. Anderson, Solutions to second-order three-point problems on time scales, J. Difference Equ. Appl., 8(2002)(8), 673-688.
4. F. Atici and A. C. Peterson, Inequality for a 2nth order difference equation, PanAmer. Math. J., 6(1996), 41-49.
5. R. Avery, Three positive solutions of a discrete second order conjugate problem, PanAmer. Math. J., 8(1998), 79-96.