1. Filtering and control problems for partial differential equations;Balakrishnan,1976
2. Boundary control of parabolic equations: L-Q-R theory;Balakrishnan,1978
3. Una caratterizzazione dei generatori di funzioni coseno astratte;DaPrato;Boll. Unione Matematica Italiana,1967
4. Linear Operator I;Dunford,1957
5. Ordinary differential equations in linear topological spaces, Pts. I;Fattorini;J. Differ. Equations,1968