@article{EJDE_2009__2009__a34,
     author = {Wang, Yong and Tian, Junkang},
     title = {Periodic solutions for a {Li\'enard} equation with two deviating arguments},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2009},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a34/}
}