1. The dynamics of arthropod predator–prey systems;Hassell,1978
2. Discrete-time models for two-species competition;Hassell;Theor Popul Biol,1976
3. Populations biology;Levin,1982
4. Uniformly persistent systems;Butler;Proc Amer Math Soc,1986
5. Persistence in dynamical systems;Butler;J Differential Equations,1986