Periodic and asymptotically periodic solutions of the nonlinear equation Δ2xn + anf(xn) = 0, n ∈ N, are studied.
@article{urn:eudml:doc:41022, title = {The periodic solutions of the second order nonlinear difference equation.}, journal = {Publicacions Matem\`atiques}, volume = {32}, year = {1988}, pages = {49-56}, zbl = {0649.39005}, mrnumber = {MR0939768}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:41022} }
Musielak, Ryszard; Popenda, Jerzy. The periodic solutions of the second order nonlinear difference equation.. Publicacions Matemàtiques, Tome 32 (1988) pp. 49-56. http://gdmltest.u-ga.fr/item/urn:eudml:doc:41022/