1. Kalman, R. E.,On the General Theory of Control Systems, Proceedings of the First IFAC Congress, Vol. 1, Butterworths, London, 1961.
2. Kalman, R. E.,Canonical Structure of Linear Dynamical Systems, Proceedings of National Academy of Sciences, Vol. 48, 1962.
3. Kalman, R. E., Ho, Y. C., andNarendra, K. S.,Controllability of Linear Dynamical Systems, Contributions to Differential Equations, Vol. 1, 1962.
4. Gilbert, E. G.,Controllability and Observability in Multivariable Control Systems, SIAM Journal on Control, Vol. 1, No. 2, 1963.
5. Kalman, R. E.,Mathematical Description of Linear Dynamical Systems, SIAM Journal on Control, Vol. 1, No. 2, 1963.