@article{05561784,
title = {Positive periodic solutions of neutral functional differential equations with a parameter and impulse.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {2008},
year = {2008},
zbl = {1170.34347},
language = {en},
url = {http://dml.mathdoc.fr/item/05561784}
}
Fan, Xuanlong; Li, Yongkun. Positive periodic solutions of neutral functional differential equations with a parameter and impulse.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2008 (2008) . http://gdmltest.u-ga.fr/item/05561784/