1. Structural uncontrollability of sensitivity coefficients;Guardabassi,1968
2. On the optimization of continuous linear systems with sensitivity constraints;Guardabassi,1968
3. On the general theory of control systems;Kalman,1961
4. Can the terminal conditions of time invariant linear systems be made immune against small parameter variations?;Bertelè,1968
5. On the insensitivity of the terminal conditions in open-loop control systems;Guardabassi;Trans. IEEE Aut. Control,1968