1. Stability Theory of Dynamical Systems;Bhatia,1970
2. Stability and Periodic Solutions of Ordinary and Functional Differential Equations;Burton,1985
3. Uniformly persistent systems;Butler,1986
4. Integrodifferential equations and delay models in population dynamics;Cushing,1977
5. Persistence in models of predatorprey populations with diffusion;Dunbar;J. Differential Equations,1986