1. Differential-Difference Equations;Bellman,1963
2. Another generalization of the Schauder fixed point theorem;Browder;Duke Math. J.,1965
3. A further generalization of the Schauder fixed point theorem;Browder;Duke Math. J.,1965
4. The Lefschetz Fixed Point Theorem;Brown,1971
5. Bifurcation from simple eigenvalues;Crandall;J. Functional Analysis,1971