@article{05816434,
title = {Oscillation theorems for second-order damped nonlinear differential equations.},
journal = {International Journal of Differential Equations},
volume = {2009},
year = {2009},
doi = {10.1155/2009/714357},
zbl = {1207.34083},
language = {en},
url = {http://dml.mathdoc.fr/item/05816434}
}
Qin, Hui-Zeng; Ren, Yongsheng. Oscillation theorems for second-order damped nonlinear differential equations.. International Journal of Differential Equations, Tome 2009 (2009) . doi : 10.1155/2009/714357. http://gdmltest.u-ga.fr/item/05816434/