@article{05237410, title = {Perturbation method for linear difference equations with small parameters.}, journal = {Advances in Difference Equations [electronic only]}, volume = {2006}, year = {2006}, doi = {10.1155/ADE/2006/19214}, zbl = {1139.39003}, language = {en}, url = {http://dml.mathdoc.fr/item/05237410} }
Zerizer, Tahia. Perturbation method for linear difference equations with small parameters.. Advances in Difference Equations [electronic only], Tome 2006 (2006) . doi : 10.1155/ADE/2006/19214. http://gdmltest.u-ga.fr/item/05237410/