@article{05726170, title = {Uniqueness of periodic solution for a class of Li\'enard }, journal = {Advances in Difference Equations [electronic only]}, volume = {2010}, year = {2010}, doi = {10.1155/2010/235749}, zbl = {1205.34041}, language = {en}, url = {http://dml.mathdoc.fr/item/05726170} }
Cao, Fengjuan; Han, Zhenlai; Zhao, Ping; Sun, Shurong. Uniqueness of periodic solution for a class of Liénard . Advances in Difference Equations [electronic only], Tome 2010 (2010) . doi : 10.1155/2010/235749. http://gdmltest.u-ga.fr/item/05726170/