@article{05237452, title = {Unbounded perturbations of nonlinear second-order difference equations at resonance.}, journal = {Advances in Difference Equations [electronic only]}, volume = {2007}, year = {2007}, doi = {10.1155/2007/96415}, zbl = {1154.39010}, language = {en}, url = {http://dml.mathdoc.fr/item/05237452} }
Ma, Ruyun. Unbounded perturbations of nonlinear second-order difference equations at resonance.. Advances in Difference Equations [electronic only], Tome 2007 (2007) . doi : 10.1155/2007/96415. http://gdmltest.u-ga.fr/item/05237452/