@article{05643227,
title = {Periodic solutions for a Li\'enard equation with two deviating arguments.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {2009},
year = {2009},
zbl = {1186.34093},
language = {en},
url = {http://dml.mathdoc.fr/item/05643227}
}
Wang, Yong; Tian, Junkang. Periodic solutions for a Liénard equation with two deviating arguments.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2009 (2009) . http://gdmltest.u-ga.fr/item/05643227/