@article{EJDE_2010__2010__a115,
     author = {Du, Bo and Wang, Xiaojing},
     title = {Periodic solutions for a second-order neutral differential equation with variable parameter and multiple deviating arguments},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2010},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2010__2010__a115/}
}