@article{ARM_2011__47_4_a3,
     author = {Pan, Lijun},
     title = {Periodic solutions for $n$-th order delay differential equations with damping terms},
     journal = {Archivum mathematicum},
     pages = {263--278},
     publisher = {mathdoc},
     volume = {47},
     number = {4},
     year = {2011},
     mrnumber = {2876949},
     zbl = {1249.34206},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2011__47_4_a3/}
}