@article{05028522,
title = {Periodic solutions of second-order Li\'enard equations with },
journal = {Journal of Inequalities and Applications [electronic only]},
volume = {2006},
year = {2006},
doi = {10.1155/JIA/2006/98685},
zbl = {1101.34031},
language = {en},
url = {http://dml.mathdoc.fr/item/05028522}
}
Wang, Youyu; Ge, Weigao. Periodic solutions of second-order Liénard equations with . Journal of Inequalities and Applications [electronic only], Tome 2006 (2006) . doi : 10.1155/JIA/2006/98685. http://gdmltest.u-ga.fr/item/05028522/