1. Linear Operators;Dunford,1957
2. Linear Operators;Dunford,1963
3. Controllability of linear dynamical systems;Kalman;Contrib. Diff. Eqs.,1963
4. Mathematical description of linear dynamical systems;Kalman;J. Soc. Indust. Appl. Math. ser. A,1963
5. Control in finite time of differential equations in Banach space;Fattorini;Commun. Pure Appl. Math.,1966