1. The time optimal control problem;LaSalle,1960
2. Controllability of linear dynamical systems;Kalman;Contrib. Diff. Eq.,1963
3. Leonard Weiss and R. E. Kalman, Contributions to linear system theory. To appear in Intern. J. Eng. Sci.
4. Theory of Ordinary Differential Equations;Coddington,1955
5. Mathematical description of linear dynamical systems;Kalman;J. Soc. Ind. Appl. Math. Control, Ser. A,1963