@article{05690826, title = {Nonlinear discrete periodic boundary value problems at resonance.}, journal = {Advances in Difference Equations [electronic only]}, volume = {2009}, year = {2009}, doi = {10.1155/2009/360871}, zbl = {1192.39004}, language = {en}, url = {http://dml.mathdoc.fr/item/05690826} }
Ma, Ruyun; Ma, Huili. Nonlinear discrete periodic boundary value problems at resonance.. Advances in Difference Equations [electronic only], Tome 2009 (2009) . doi : 10.1155/2009/360871. http://gdmltest.u-ga.fr/item/05690826/