1. Ambrosetti A., Rabinowitz P. H., "Dual variational methods in critical point theory and applications", J. Funct. Anal. 14 (1973) 349-381.## 2. Bonanno G., "A Critical point theorem via the Ekeland variational principle", Nonl. Anal. TMA 75 (2012) 2992-3007. ## 3. Bonanno G., Candito P., "Infinitely many solutions for a class of discrete non-linear boundary value problems", Appl. Anal. 884 (2009) 605-616. ## 4. Bonanno G., Candito P., D’Agu‘i G., "Variational methods on finite dimensional Banach spaces and discrete problems", Adv. Nonlinear Stud. 14 (2014) 915-939. ## 5. Candito P., D’Agu G., "Three solutions for a discrete nonlinear Neumann problem involving the -Laplacian", Adv. Difference Equ. (2010) Art. ID 862016, 11. ## 6. Candito P., Giovannelli N., "Multiple solutions for a discrete boundary value problem", Comput. Math. Appl. 56 (2008) 959-964. ## 7. Chu J., Jiang D., "Eigenvalues and discrete boundary value problems for the one-dimensional - Laplacian", J. Math. Anal. Appl. 305 (2005) 452-465. ## 8. Galewskia M., "On a new multiple critical point theorem and some applications to anisotropic problems", Taiwanese J. Math. Vol. 19, No. 5 (2015) 1495-1508. ## 9. Galewskia M., Molica Biscib G., Wieteskaa R., "Existence and multiplicity of solutions to discrete inclusions with the -Laplacian problem", J. Difference Equ. Appl. 21(10) (2015) 887-903. ## 10. Guiro A., Kone B., Ouaro S., "Weak heteroclinic solutions and competition phenomena to anisotropic difference equations with variable exponents", Opuscula Math. Vol. 34, No. 4, (2014) 733-745. ## 11. Heidarkhani S., Khaleghi Moghadam M., "Existence of Three solutions for Perturbed nonlinear difference equations", Opuscula Math. Vol. 34, No. 4 (2014) 747-761. ## 12. Henderson J., Thompson H. B., "Existence of multiple solutions for second order discrete boundary value problems", Comput. Math. Appl. 43 (2002) 1239-1248. ## 13. Kelly W. G., Peterson A. C., "Difference Equations: An Introduction with Applications", Academic Press, San Diego, New York, Basel (1991). ## 14. Khaleghi Moghadam M., Avci M., "Existence results to a nonlinear -Laplacian difference equation", J. Difference Equ. Appl. Vol. 23, No. 10 (2017) 1652-1669. ## 15. Khaleghi Moghadam M., Heidarkhani S., Henderson J., "Infinitely many solutions for perturbed difference equations", J. Difference Equ. Appl. Vol. 20, No. 7 (2014) 1055-1068. ## 16. Khaleghi Moghadam M., Henderson J., "Triple solutions for a dirichlet boundary value problem involving a perturbed discrete -laplacian operator", Open Mathematics J., 15, (2017) 1075-1089. ## 17. Khaleghi Moghadam M., Li L., Tersian S., "Existence of three solutions for a discrete anisotropic boundary value problem", Bull. Iranian Math. Sco. Vol. 44, No. 4 (2018) 1091-1107. ## 18. Khaleghi Moghadam M., Heidarkhani S., "Existence of a non–trivial solution for nonlinear difference equations", Differ. Equ. Appl. 64 (2014) 517-525. ## 19. Khaleghi Moghadam M., Wieteska R., "Existence and uniqueness of positive solution for nonlinear difference equations involving p(k)-laplacian operator", An. Stiint. Univ. Ovidius Constant a Ser. Mat. Vol. 27 (1) (2019) 141-167. ## 20. Li Y., Lu L., "Existence of positive solutions of -Laplacian difference equations", Appl. Math. Lett. 19 (2006) 1019-1023. ## 21. Zeidler E., "Nonlinear functional analysis and its applications", Vol. II B, Berlin-Heidelberg-New York (1985). ##
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