@article{05575270, title = {Existence of periodic solutions for a delayed ratio-dependent three-species predator-prey diffusion system on time scales.}, journal = {Advances in Difference Equations [electronic only]}, volume = {2009}, year = {2009}, doi = {10.1155/2009/141589}, zbl = {1171.34057}, language = {en}, url = {http://dml.mathdoc.fr/item/05575270} }
Liu, Zhenjie. Existence of periodic solutions for a delayed ratio-dependent three-species predator-prey diffusion system on time scales.. Advances in Difference Equations [electronic only], Tome 2009 (2009) . doi : 10.1155/2009/141589. http://gdmltest.u-ga.fr/item/05575270/