1. On the controllability of delay-differential systems;Weiss;SIAM J. Control,1967
2. Lectures on Controllability and Observability;Weiss,1969
3. Controllability for various linear and nonlinear system models;Weiss,1970
4. Some New Results and Problems in the Theory of Functional-Differential Equations;Halanay,1968
5. R. M. Brooks and K. Schmitt, Pointwise completeness of differential-difference equations, to be published.