@article{05561834,
title = {Positive periodic solutions for a predator-prey model with time delays and impulsive effect.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {2008},
year = {2008},
zbl = {1173.34039},
language = {en},
url = {http://dml.mathdoc.fr/item/05561834}
}
Gao, Shan; Li, Yongkun. Positive periodic solutions for a predator-prey model with time delays and impulsive effect.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2008 (2008) . http://gdmltest.u-ga.fr/item/05561834/