1. Positively invariant regions for systems of nonlinear diffusion equations;Chueh;Indiana Univ. Math. J.,1977
2. Isolated Invariant Sets and the Morse Index;Conley,1978
3. Remarks on the stability of steady-state solutions of reaction-diffusion equations;Conley,1980
4. Topological techniques in reaction-diffusion equations;Conley,1980
5. Algebraic and topological invariants for reaction-diffusion equations;Conley,1982