@article{02113408,
title = {Positive solutions of a neutral difference equation with positive and negative coefficients.},
journal = {Georgian Mathematical Journal},
volume = {11},
year = {2004},
pages = {177-185},
zbl = {1059.39009},
language = {en},
url = {http://dml.mathdoc.fr/item/02113408}
}
Tang, Xian Hua; Cheng, Sui Sun. Positive solutions of a neutral difference equation with positive and negative coefficients.. Georgian Mathematical Journal, Tome 11 (2004) pp. 177-185. http://gdmltest.u-ga.fr/item/02113408/