@article{02204836,
title = {Positive periodic solutions for nonlinear difference equations via a continuation theorem.},
journal = {Advances in Difference Equations [electronic only]},
volume = {2004},
year = {2004},
pages = {311-320},
doi = {10.1155/S1687183904308113},
zbl = {1095.39011},
language = {en},
url = {http://dml.mathdoc.fr/item/02204836}
}
Wang, Gen-Qiang; Cheng, Sui Sun. Positive periodic solutions for nonlinear difference equations via a continuation theorem.. Advances in Difference Equations [electronic only], Tome 2004 (2004) pp. 311-320. doi : 10.1155/S1687183904308113. http://gdmltest.u-ga.fr/item/02204836/