1. Differential-Difference Equations;Bellman,1963
2. Two Bifurcation Problems;Chafee,1966
3. Nonlinear Differential Equations;Davies,1966
4. A periodicity theorem for autonomous functional differential equations;Grafton;J. Differential Equations,1969
5. Linear functional differential equations with constant coefficients;Hale;Contr Differential Equations,1963