@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/