@article{05312436,
title = {The existence and uniqueness of solution of Duffing equations with non-},
journal = {Boundary Value Problems [electronic only]},
volume = {2008},
year = {2008},
doi = {10.1155/2008/859461},
zbl = {1151.34308},
language = {en},
url = {http://dml.mathdoc.fr/item/05312436}
}
Zhou, Ting; Huang, Wenhua. The existence and uniqueness of solution of Duffing equations with non-. Boundary Value Problems [electronic only], Tome 2008 (2008) . doi : 10.1155/2008/859461. http://gdmltest.u-ga.fr/item/05312436/