@article{00026418, title = {Oscillations in linear difference equations with variable coefficients.}, journal = {Journal of Applied Mathematics and Stochastic Analysis}, volume = {4}, year = {1991}, pages = {241-258}, doi = {10.1155/S1048953391000199}, zbl = {0747.39003}, language = {en}, url = {http://dml.mathdoc.fr/item/00026418} }
Philos, Ch.G.; Purnaras, I.K. Oscillations in linear difference equations with variable coefficients.. Journal of Applied Mathematics and Stochastic Analysis, Tome 4 (1991) pp. 241-258. doi : 10.1155/S1048953391000199. http://gdmltest.u-ga.fr/item/00026418/