1. The representation of solutions of linear functional differential equations;Banks;J. Differential Equations,1969
2. Differential-Difference Equations;Bellman,1963
3. Mathematical Experimentation in Time-Lag Modulation;Bellman;Rand Corporation, Memorandum RM-4432,1965
4. Almost periodic functions;Besicovilch,1954
5. Dichotomies for linear difference equations;Coffman;Math. Ann.,1967