@article{05142055,
title = {Existence of positive periodic solutions to third-order delay differential equations.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {2006},
year = {2006},
zbl = {1118.34055},
language = {en},
url = {http://dml.mathdoc.fr/item/05142055}
}
Gui, Zhanji. Existence of positive periodic solutions to third-order delay differential equations.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2006 (2006) . http://gdmltest.u-ga.fr/item/05142055/