@article {IOPORT.50306934,
    author       = {Liu, Guirong and Yan, Jurang},
    title        = {Positive periodic solutions for neutral delay ratio-dependent predator-prey model with Holling type III functional response},
    year         = {2011},
    journal      = {Applied Mathematics and Computation},
    volume       = {218},
    number       = {8},
    pages        = {4341-4348},
    doi          = {10.1016/j.amc.2011.10.009},
    identifier   = {50306934},
}