1. Sedici modi di definire la completa controllabilita negli spazi di dimensione infinita;Bacciotti;Rend. Sem. Mat. Univ. Politec. Torino,1983
2. Applied Functional Analysis;Balakrishnan,1976
3. Differential Difference Equations;Bellman,1963
4. Stabilizability and detectability for evolution systems on Banach spaces;Bhat;Proceedings of the 1976 CDC,1976
5. on Approximate and exact null controllability of delay systems;Colonius;Systems Control Lett.,1984