4Takeuchi Y. Conflict between the need to forage and the need to avoid competition persistence of two-species model[J].Math Biosci, 1990,99 : 181-194.
5Doujiawei.Persistence and periodic solutions of a system of two-competing species with functional response.生物数学学报,1997,12(1):15-22.
6Arditi R, Ginzburg L R, Akcakaya H R. Variation inplankton densities among lakes.. A case for ratio-dependent models[J], American Nat,1991,138:1287-1296.
7Arditi R, Saiah H. Empirical evidence of the role of heterogeneity in ratio-dependent consumption[J]. Ecology, 1992,73:1544-1551,.
8Arditi R, Perrin N, Saiah H. Functional response and heterogeneities[J]. An experiment test with eladocerans OIKOS, 1991,60: 69-75.
9Yang Kuang. Delay Differential Equations with Application in Population Dynamics[M]. San Diego, CA, 1993.
10Barbahat I. Systems d'equations differentielle d'oscillations nonlinearies[J].Rev Roumaine Math Pures Appl, 1959,4 (2) : 267-270.
