1. An ecospheric recovery model for agriculture–industry interactions;Agyemang;Diff. Eqns. Dyn. Syst.,2007
2. Ordinary Differential Equations: Introduction to Non-Linear Analysis;Amman,1990
3. Equilibria and dynamics in an economic predator–prey model of agriculture;Apedaile;Math. Comput. Model.,1994
4. Applications of Center Manifold Theory;Carr,1981
5. Uniformly persistent systems;Butler;Proc. Amer. Math. Soc.,1986