@article{05231664,
title = {Existence of positive periodic solution of a periodic cooperative model with delays and impulses.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2006},
year = {2006},
doi = {10.1155/IJMMS/2006/38617},
zbl = {1144.34047},
language = {en},
url = {http://dml.mathdoc.fr/item/05231664}
}
Li, Yongkun; Xing, Wenya. Existence of positive periodic solution of a periodic cooperative model with delays and impulses.. International Journal of Mathematics and Mathematical Sciences, Tome 2006 (2006) . doi : 10.1155/IJMMS/2006/38617. http://gdmltest.u-ga.fr/item/05231664/