@article{00844417, title = {Comparison and oscillation results for delay difference equations with oscillating coefficients.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {19}, year = {1996}, pages = {171-176}, doi = {10.1155/S0161171296000245}, zbl = {0840.39006}, language = {en}, url = {http://dml.mathdoc.fr/item/00844417} }
Yan, Weiping; Yan, Jurang. Comparison and oscillation results for delay difference equations with oscillating coefficients.. International Journal of Mathematics and Mathematical Sciences, Tome 19 (1996) pp. 171-176. doi : 10.1155/S0161171296000245. http://gdmltest.u-ga.fr/item/00844417/