\input zb-basic
\input zb-ioport
\iteman{io-port 50306934}
\itemau{Liu, Guirong; Yan, Jurang}
\itemti{Positive periodic solutions for neutral delay ratio-dependent predator-prey model with Holling type III functional response}
\itemso{Applied Mathematics and Computation 218, No. 8, 4341-4348 (2011).}
\itemcc{}
\itemut{}
\itemli{doi:10.1016/j.amc.2011.10.009}
\end