Periodicity in Nonlinear Difference Equations.
@article{1731, title = {Periodicity in Nonlinear Difference Equations}, journal = {CUBO, A Mathematical Journal}, volume = {4}, year = {2002}, language = {en}, url = {http://dml.mathdoc.fr/item/1731} }
Grove, E. A.; Ladas, G. Periodicity in Nonlinear Difference Equations. CUBO, A Mathematical Journal, Tome 4 (2002) . http://gdmltest.u-ga.fr/item/1731/